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 0xc4a84fe56e8ac9998923b2973a15a8ec750a705d73d29f174be10df5cf96967c. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b3b86b4-36d9-47ce-bf93-06be705e40e9.json and https://artists.proofprofile.net/proofs/artist/4b3b86b4-36d9-47ce-bf93-06be705e40e9.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 0x69aac3b7dd185720ec9551bfa0038f310304d7670c406d9bc83976e4ebb6b534. 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/NOX8G2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83f67c46a58ca219fcf5251ade5f501cca3e051d9f52c24879e8c832df720f0f. 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/NOX8G2400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac093f819b1437b089fc3bf113d0b1d567b2106fb06c9797ab7760c3b3f73b1. 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/NOX8G2400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aa1613e71dab3fbd3387a5178c57592958ec5b5637df8e20b42c9acb7b5a90. 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/NOX8G2400133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaed7f70eab66dc71c7de15f0facf57d802986a7c60d2fa44e2f445bf722a6ee0. 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/NOX8G2400134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c42c34559556226cff01befcebd95a38e459f3db2080e368c1fd5c1959fe1a6. 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/NOX8G2400135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3275693c17ee3be85971a0c468838f1383e14127faa6bf87d5d748a1e945e7e4. 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/NOX8G2400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4689ae628857433005d6c39be3252cf11c59e11e006515401a7330baf6f9747. 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/TCAGE2256454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fefe9d27ff03f2f5165f67efb74266dd0427b63a84844c83e64aba158219ec4. 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/USA2P2472896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaff5f0a18dafd0565c46652b0b4b94b0d2ae3aa27978b42f304e966659b7e6. 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/USA2P2472897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4834ff753c90c6750943512086b3f06dfa6cdfeed33521685a0af140c2b74b5. 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/USA2P2472898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d67b3336ed03e7bc3218ae4499c96a19ff77027414aed23ebc40a249371d36a. 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/USA2P2472899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977834b23c10c5599eea30a0793fdddfc5c2b6b30b0e58b000fd87bd858f1c47. 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/USA2P2472900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b5a9791b89c8c24ab318765774deb4153dcca8f2b5a5580686456ccf57cca5. 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/USA2P2472901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51558e6334aec5e34fea3ce36aeadef5123a13891e23af2c6629c760e37b62f. 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/NOX8G2400279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671c0251d820fe6b2a471db6a6cb0323d25af3d0df9957963938bb6156b2b763. 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/NOX8G2400280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2f6e5663f0a7b8eb9cb7b8b0df0362dbcd2ce590e762b6a9c281f617f3899f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NOX8G2400278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x476d288c0c39a7fa51e248b4bbe6585b84acf955e8f056439f61c369017dab73. 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/NOX8G2400236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2f991aef977ece41b7ec212a4b203d77969ed94f69054fbfe0e4846a86f79. 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/NOX8G2400244.