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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e98c82bea064505e6833df6f85697cdb900a63a578913abf3338f06a544c8. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4e4e5e40-eeb5-43c7-88b4-5acf79fd2857.json and https://artists.proofprofile.net/proofs/artist/4e4e5e40-eeb5-43c7-88b4-5acf79fd2857.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf0b4b55606a640e65cf507483708b494e696791c8580d9cc06081ea1760d3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMZ92448084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b03b1ce0e6173ef30983726c9fea70c7e1048c26b099e8fa18595e9cdb3399e. 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/BKCMX2400149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601de41734335470da1bab87a987d3d75f5aedb316efebf857b6fa002f641af. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWY2306580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7fbb2809101d9c1e941f40bef517a60699f753215345b517ffc42da309be7b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMZ92493539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b0f403720d52f4496bfb355df802d148cecec71e498acdc3245c8e90bc0edd. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZW9L2249965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e526048083dcdd9b4bd86216edf5673c2e8cbada04f820b11ee2b3a7e22e092. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZNJY2454067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c8f5d4c8226628960383097bd86ffc9ff55da8b8bd0004fe9edee002f40a9f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BRWMB2400888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef348025dc080bb5cdc37807aa008f0a97230f24643b11f5f10be44cf6080bdd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BRWMB2400468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2e014e1dba4438ce77a478877cce9f208ec74b160e47ffda271a51b671bdf2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJV2462091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21be191d879c86fa84cf9fc206e718962b3dac74770008b523001724d81c76b5. 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/QZNJV2444403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fea635220ec2c27b99ba01243b579068fc70f1436263cd09cb4325e737a3b90. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZK6F2426417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb934afaa46d5897ced0cfc6aa301def00450d08019d4ab6b5d96d095087b1b25. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QZNJV2409591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7b29e5083730ad8605325ca90431bb93bb8067c7e11e278875b155df85a716e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMZ92468673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x739713f20a12eeb878b90d4b62b6dd488a9149a286aad31744d227cebca41aae. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2499563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2966eb3fe734374f93b52437d88233566131b0fd98f987b93ceafa8e92217f04. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKCMX2400147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ff2299575451975b923fd59d6ac130cdf3a4db9d30a533ab0d9920bb6b358. 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/US7VG2466856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4b8ea9efa49e90edd324f8d5b9f1b2939de5bcb475c8889071565fd8784c0fa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/US7VG2496129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea364bd5954eb0044a1ac0e442eb03efd8d18dd9697f858c0c32111f86077b7c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAY2367723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4324541551e01a40b10fd2436ea26b0736bfa04a1a30bfc6b7e717194e5be8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC8182300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5045162799fb5f9a46a8fde45c1acd4bc6db1675aa21f7b4a4e0fb97c8c98169. 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/QZNJZ2305975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed36fafccf69046e957ec56d7d0df2af8cfd36c105ae5aabcd9d6ec91f3972b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2331253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf667abf96a18b17cf9de0fce2767bc81aceccc1b78b14b87579438b889b53d3e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2364874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b7174e9f7cd8d8b94c35c6d077c7fc8b7f089021e18b3bec76e6a615adca55. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2364875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x446f7e14416643ff6ccbf4727a8424ba312491cb432ba5beba7221ddec7e36f3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZGLM2364876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd96efdf8536106d247368febb5062f2cd6ab6879484e646b580a86ff6386530. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLM2364873.
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 0xfe3433c3cbcbdd8b3d8841b1da289cbffd217da416a05fb0228204600279c2db. 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/QZW9M2285132.