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 0x24b4422530e81665f18a404ce1bbd2c8ae267a9723b96d772abb7eb3c0fc4f42. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/254c596d-0200-43e4-a76f-d3e712cd2122.json and https://artists.proofprofile.net/proofs/artist/254c596d-0200-43e4-a76f-d3e712cd2122.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 0xc455523352ed9fd99ce972914b6b3f244254c16f3951252d41e8b3dc9546f22b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCACN1689430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fb4b418b1631f695c8d589b9c54cf4315964d31b7b16a0cbed52f46ea406164. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEM1936309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1042dfd69627efefedce9b59bfbfdb6f207e67ac586f0dfd6684dda3dbdc16. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/TCAEX2048157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ccc74256e1fd8798d4dbb475db6b3f259cb1d29fba9054125f61947403444a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/TCAEX2099336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2244fba5326b1bcbb2880c07436a7cbc14310109e554850ae28e7fc709799c76. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/TCAEX2099348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5db2b1c61b13b5403184a7c75489a4113cb2d186ea30bef47c46a360d4e1ad. 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/TCAFR2128274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5db2b1c61b13b5403184a7c75489a4113cb2d186ea30bef47c46a360d4e1ad. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAFR2128274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f52d88f5b2620137d37576fea09bef99e95c89e5f5c3348654eeeff457b6ae. 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/TCAFS2168309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9fb06b46f2b608849a1502ceb02fec4f7a017cfbe2344f33c08c48805ed9ee. 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/TCAFS2168453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e412448fe1d1a3d3858267a8ec3de2e92bf9ca208e918c86c90180ddc87bc1. 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/TCAFS2168462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b7b2e68e2fdc4ce3c3cc6b893ed11f3646b85df41a0dd4870cce67c46ac2d5. 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/TCAFS2168464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ace4776ceb90d1ace25e3de9595cd1092d246e34caa914613b15847f41f110. 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/TCAFS2168485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d81291fa9f9460ad6e5144119723024ad8dae9a13a9aa2a7be637a082ae8094. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:44:30Z), 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/TCAHB2333866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b1b1ae48f2fa0bfb4f15042770d341716753665604dcfcd702c39f4d0dfbaf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAHQ2380334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80d302346452eef8f7abc2ee54f57bcff5481f22ad34d5cd926100a6310a99c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:21:49Z), 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/TCAHU2432217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f61a2e47e8c8d064a99a526bb5bafcc015a2ed3bf4ec8fe266ced4a1888d20. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHW2467709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfcf979b3d3afc78912c012899207afce6739042548667811c3ae914bd12a2b. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJZ2548448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ba225497157bb09918d16aeaa0ccfcad78b49684a95b42be6ecf37547ed397. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QT65Z2592786.