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 0xebaac2c156683c988c39673ff1af906b903f1d35787058b79f58e508170fc49b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bd66a954-782d-4d15-89ad-91fe0ab3c84d.json and https://artists.proofprofile.net/proofs/artist/bd66a954-782d-4d15-89ad-91fe0ab3c84d.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 0x089cf3d1c7da625dd5ab4d3109f383d44c1254930a64fc7c0998958c6d9c5cd4. 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/USA2P1369462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2e3cf85844f73d75325d8ac008b3a3c316f136a85d4ed407f7286edba86e90b. 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/USA2P1369464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452527cbe774347c86d328249c8112ced7c8deaf6ebb065a98fb92912191a981. 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/USA2P1369465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7634f4da37588148f9bcb9e8804cd4849e2c2d3e1d51c8b3a316609d2840f78a. 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/USA2P1369466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x027aebdefc00e3c03f925b352eadeede9bae40e6148e327956379dd65dc11fef. 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/USA2P1369467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0243cc8837125238576fe93ed025cfef3f306f3fa6b209147f4b1f07d6bc22c7. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USA2P1369468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff804ea5b9d9ddf75b2b71035f4c33db66d4507b4a8f759252a70ebf42a2699. 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/USA2P1369469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75369c9c6b2e16b03830abfe5c5a4985c6078235a022300e8628896306b4185a. 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/USA2P1369470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18cca47f6df716fa0eff757d4ebad514c7cac03e0b036f53bb4745122a5458c. 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/USA2P1369471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4555949b503b4db2ed4f39d3bbb8b81462c299b843518409d049754358d0db. 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/USA2P1369472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e66cc1b08ca5b022f64bab15d40a02460553c3190a26ec5254a6da62ff5db34. 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/USA2P1369473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab6969ec65f8f21e3706b54c4d022ec167ce25bce33b4885a3e37073a3d5565. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/USA2P1369474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x637776d5417eb8efc46e8540aebe4b66b3ed586e673daf3b1a68053af6022928. 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/USA2P1369475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7c27eb3aeaa1ce232946d5192a4bca74627ac015d3d9f545a1e61667756bfc. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QM4TX1561848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0b45084f964d877939eab1b68a8e29fa8b7220e0ead035fdcf10643f5d1d54. 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/QM4TX1561862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd857f0b5bf16d9e23af3c81349a4751e40dbdf70f78b97f66614d11e335d6a63. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QM4TX1561868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10399acce3e8ae0e6ee8d88726395c7bb9a35d5256421fdae3be5d4a7cf5c11a. 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/QM4TX1561877.