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 0x4eeea15cbd06a303ff2b58d304265ab7dba5de05b002b40c62cedb9387f38000. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/22fe9b27-34d4-4673-aed3-7eac70b48f64.json and https://artists.proofprofile.net/proofs/artist/22fe9b27-34d4-4673-aed3-7eac70b48f64.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 0x334f68d9779732fe854df5dffaa2553552fce5162accd07340303b02f55d99f3. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAJC2446364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47a8aca825f52d5cf62bfa8eb4be692f85f97e778da6e3441089f1c9a08edbb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:19:10Z), 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/TCAJH2525832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd0912a824b53731be66e247b4a878aba441ee0ef11f2dedfeeed85e69ba947. 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/TCAJH2525849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06e880ba8700d2f0e6cae77a97fa7ae1dbb458d0d246fd9bc29baa0a8c21b92. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAJH2525876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd6f0b02be8a98499007387861948b1a92cf036f152e08cf92d52438c54efad. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAJH2525946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445163fa552ea48020c0243e359399e3e949b1a47c2ee33d6b65c72b8e0b0f34. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/TCAJJ2569550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b67819cf1e1af1329970786d6abb0aaf0fe3daacaa3e9fd6a3d038aafb3528e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:11:48Z), 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/TCAJJ2569564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8fc8d52eba6bcc0e951343523c55cb7237c4006880cba69225d4fd7bc83254. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:36:40Z), 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/TCAJJ2569587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff1ff0df428ea20f16712008ae1407aac43702e4afc4aee9edab769144604c1. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAJL2547402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ec7c5f8cd476f883a74a30c23db881c14f8eafd3200380833ce5819a50ede4. 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/TCAJN2529447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a7691d11e7148433095772aff704717f71c0579f0f30d37deed2acb0076699. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAJQ2535583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32326f161b6472d5868d7f94139df1be359f111ca432ba4e0ca4fe50e1d30a5. 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/TCAJR2522307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62a7820bd6861e430c36b61957147b89cf428efd852d7f39f586e242001e07f9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QT65W2516110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6288c929b27446cba232551d39459e2572d2db86c790bcae1fe9b71b318a5154. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QT65W2597612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd238a1cce300564ffa593ccf6c4464e80df8f086803a2ef6020cddac2a76909. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZS7J2576609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0943d8b1123936976be6be84531962384c1de74cccdb1a877e13a5bb1bd04fa0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT65Y2554231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81803f429f6adb3be88eca43d902d9102f207829d229e97608e23d15a3c6ab75. 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/QT65Y2554250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020ecd963d1e4e5f711ef36d7a25731b0f92330c7539926988b795e4643b8e25. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QT6622511834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888b95e91a3588b2a5274990e0b23ae94c3fcaa7152ae0a84b6e7310d4c3fc8d. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:03:02Z), 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/QT6632559240.