1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517e41a64311f1479152ec60f4e21528a24762bc28209932f74dc5b93a95e0c. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a426dc8f-6aeb-469c-ac29-347bcf5420e6.json and https://artists.proofprofile.net/proofs/artist/a426dc8f-6aeb-469c-ac29-347bcf5420e6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70de316dfe835701ff4c51c1cd1eb846e28151511874319533351a91f6d7bbd5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2445303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a487e04b738cb595db58ac84207bbe5bec74130c503bf8b5690c35a14f8e431. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2439264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5230bf2f4201ae751f3018c90b28d586161299080b2e961e90c66b85787891. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZS672244436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878829861c8842ecf4c26577f1fdbad55db1d86ca1944d62cffecfd481939fc4. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2423870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae5f4c83b4d767513ad14444e72cb900282950c88e2187482a46d0c3f64cda7b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88222211bc258e51194a92402c7a0a0e23b0c7024dc1d06ba4f245bb09ef06c2. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2405276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fefbe78a7cb6f7e9a4c6fa489e215d66f1e7810f55bc779a9e20b150cf32cff. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2400450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b8fa95cb4f5191fad85965a8b3c009257f99f0e9c33cfecf1c23fb84247480. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2235816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe901ce8d1cca5da89e18e650a6e79524edf801af40167066db266325b9344d51. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAU2390178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6876083e36a78f02e80c7f0d17251aa782a39f7c1671d6a4df8a21bf6e2dd5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAS2340084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd114e6f4d8d8c0d1b5a5ec7fad620621837239de9728bc19bf11ccd93c8df732. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES52323398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648384a9d118f71e214dd8b21d6176f22af1679bfbae9be25b1c19eab538d109. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ62329952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418150860c551ea4cc6332a730b0a778e83b2ebcb2dc656a0506b54127aff202. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2298817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00092fdb7140afde80c652a17e78e105c31e47b7e540dd4d4ade7bdaa57f8e0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b78ebc1d0a1bef85bcc0a05f76261e86c5d2e02680a817ca7eb041ced0f540. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48021db0fb9bd6e9737bf23d9488dcf27694e6395daa0f071544b814a099bc75. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3649ad4e05105fea74942417509a1af7f92963431a12bcc226a4fd151467d37. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948945e1dddabd577bb1e88be16096e218ade6cadbd76e0dfd4d893dde427434. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94bb878141f51dd40a199897d6953a8cc6a0a7e1962b7285d1e580cd432b0a00. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a585d9c82ba899acccd69e89db3d627653f56b4e914cddfce63da713e8cfe5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813abdff25461c029a1969cc78e0f0aee41754c4311c52915a5b12e00acb41d0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50df96b7e6a7c078e3916f2dab55c6d4f99f27cb4362f93608d42af7c1e8dfd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabf38c188447fc7b6e30bba452b6117b05e9a8f1795fbb49356c281aac619dd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f15f70b2b14bc5d2d5362cade32aaab7a039c5a5994b50925e40cc5c7722fd0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa49e29cf40f5042ca09f47e946071e4bd7904256d45444ce8982c7e306a869f2. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63d63407be901ab615f173e327d91a13044e28f99d7e0184e39a9b6bf978aa6. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a902b2cd09b653924dce7093e5cc31d0f9aedf1d7ff7c5b02fd5547ce5d40b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d90b0bfe622b485b46ba609bc8661adc25d2d09cf4d996e8d53c7591eee79a. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fd8b46fde1ab464f4983589dd7abae4bd1f03da525af557bb116a0531f03e70. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bdee97d88937e7e10c999af184c194bdf4c97065455675c1a95cc74919356a. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10f7356f0797548fff9fe3c7accab3ab15d566fed71b30b6ea1f06dddac75bde. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed4c2278f93961976b1e2eedf235169fd1b8d9c51eca3b82bc6291945121154c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c99758c42ff839dc4ee3bf095b0ede50d951dfd592da6cc096569be153c20d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace6e945f9d7cbf1fdfcd993a138c12fda4239ec1852aa99012d0968fc3c2c55. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMANG2239609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093e7e77b5546ecd83a5431904c1cea7e0b695015a930198a4cc77a9b9f52bee. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5789157b24bcb0a2e88abe8e1f934e87d3fd2014727779463bf56d71a9fbcaf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9b3eccf1e03d34f2a04bcfbe5afe3c157db98aa3d08aac14850c21614641a6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5de2f77599f7536928d2f9faae1a48f9c2dee7134cac91f8dcdb1f9b4099bfa. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x619b30ad15422f9b1533c233931a9b462c4ed99db17af34cc18f9cc404912ae4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cf0d2a7cc538687cdd1bdaad797afa75f0e4b7c1eaabd7a89810c7e97e37e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284c8b9622ff9516d74b9e8ed8c7cbf96562c9bf6d7ca9f923ed4a7c32d78a0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2420041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac77f5000eae17fd290c64f8f7ca45f24bc402500340bed412428586ecc2f410. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US3DF2400462.