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 0xe61dcdf21cc955d9590020f7877e6fea062eaf03258e7ee149d10f5946275deb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556d7cb0-4bea-4368-ad1d-26bd84c8390d.json and https://artists.proofprofile.net/proofs/artist/556d7cb0-4bea-4368-ad1d-26bd84c8390d.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 0xbe57b67d63560880e3a3069aabccc93153d8ad2f0de871d1ec6d33493067dc15. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTB52255825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0063a975f59794d45a26183586e3be2cc13d28f724d0fafd1a1dd991a100dfa0. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZFZ42373412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7bfa7615eb72c9ceab4438888459b209ae776f59e26983955cb16fef7be988. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZDA72390342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd78e0205eec8f6d56d678c9aadc113abfe012b645bd5db9a640295c5fef14ae3. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/QZNWW2389228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b31612f5e29c51b7c415b9e3a77744bd1fe2a797c33e0d9d78ab34bd4e39ff. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CA5KR2420828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c990f9ce8c204d09d337e45cbdc80b07a23c25ffd276bc917c8f1da3946910. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CA5KR2420830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631e1755bd7f2c0ffb4ff48a5e390fa7b3c9f082c27a6440cf3a1297eb300ba8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZK6J2386206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc829b78a268f089d75cec991e942dc617e50b26c74e6d6fe24ffed018df74e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2420831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6c9b6e6673a112a1b10eb01f5274fef1336aec1f78b06765959d57c6d1eb7a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZHNC2323391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ce9028ebdb43e8a7be83c7ad5033fadec639236a3141233d71bf6378bb08280. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CA5KR2420832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a632fe778834b53d28dcbcdd40e2901e55fd45ef956b7fcddf1135b0be1b1ce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA82343759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da15c50bd8b6fa721e57f0813df39b102d42d8791c31564d2f4c45c65895ff5. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZMEN2489683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe665a43b9cf538308ff9a50fe08ab9fe2461f1f3aada070b5dfd442461c66783. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWT2437501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cb23c41b0216c4d09117db5d26c0ab76e03a02af47ceb615a514a3b24e9e01b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CA5KR2499739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93833c943b499b099a4641dcd648c01c3b387c8778925408b26dbf7504fa69e4. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZWFX2416989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9de526617471e7e7548bb65b42ec7139d1a22c4b2f9c1897abe3144f48da54. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZZ772400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ca28cb22cfae2eab74d057fe731d2e413cc454166d6fe5705f3b3e41139f2c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZZ7N2405631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ad824c4260159d95488ab8b8d81ed6c14d7e01ae9949161e10eca011738cc. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZZ7N2411193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6e30a83608c61ff4cd4dabe29f1bb3c292c4ef85b0e2edf6c296a7f879d560. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7N2413609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13de23a6440f02061bae73454c5be2737e913e05707570d79cf8d71100be8a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZFZ32511404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9de526617471e7e7548bb65b42ec7139d1a22c4b2f9c1897abe3144f48da54. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-21T22:56:27Z), 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/QZZ772400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07eb42a1f0aadc8c0542baa25b0fcb274bbbe9fbc6e37d5bfb787a3da61e9452. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFZ32511400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5ad824c4260159d95488ab8b8d81ed6c14d7e01ae9949161e10eca011738cc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZZ7N2411193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13de23a6440f02061bae73454c5be2737e913e05707570d79cf8d71100be8a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZFZ32511404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ac2d9c92e3f2620b8be610b2e6fe2186514eebc3bfb095507bd718763b5453. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32511407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533b7ed35265795461c4949ffcd2d33ace5ac1e523b63c89f650bee83589c900. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFZ32511408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b158ede78659f6987cd806642a44da25487a32b19689b11dadb6c9d99ef47a. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/QZFZ62546067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8526f7e03378b54d7603076aa7f68430331d37f5dfb1b9a8d3eb22e181821c. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/QZMEQ2536433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e62f15591e2971ed00b4583f72386457b5a6251e4ac8b7a32915a8b6eb5b96e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZMEQ2538669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233a0136ac7bfaa9f6860337c77ea0a967c19f43b5648479ee2cb8c1db2dd969. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWR2514020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1740911ea2cfe2258da8d8a1200e300fd1eeb7114ce9ba455a3cbeb05662aea7. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZRP42524757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4a96df7d86c1c193b20f3d0694b1cbe2ef2af7beceeed62df97ce43b4fb3a3. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTBC2577807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d70206aa40ff69128d45ddc178fce19737ddb4fb5f751419e76ba328ede5e33. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZTBF2500570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefbf58b19401bb1969754a5ceeec6932760ddc502630275b6a0858912a8baa4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QT3EX2517472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57fd2c577b56276928f897c83e6ce832f1f138b144cbfd022ed43d5aac404810. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTLA2450601.