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 0x591e99628e53054cc0330532a707d1a7d7234fdb4c86e0aec0c9374e9dbaa0fc. 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/bc0280c1-bc99-42f3-b76a-f5ccf5013bee.json and https://artists.proofprofile.net/proofs/artist/bc0280c1-bc99-42f3-b76a-f5ccf5013bee.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 0x04b2fbc5f22ad319a1ee4ce7587450ad40bd8feeb60991deae147973d0fe6a6b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BR6MU1700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b89fc1fbefcd5eac390a7cfc2c0e073b00f3d8afd5125ea1ec5e72f3c6bd508. 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/BR6MU1700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b88270248debc467844163c4c775aa9768b0f5cfe338f33c3a71b08cf1e3d2. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/BR6MU1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf9573f324e5727565122fab9b326e0dda5e3a4d6c90d641c7ea1f83c72625dd. 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/BR6MU1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74fd08a443cb6f3277ea5f690c7f6fe928450f36e9b1b32d990f752731e7a54. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BR6MU1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11462dfa3abeb9485efe758a78fdd2c6a0f46ecda46f825f56138789115886d. 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/BR6MU1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b2ebc9308eb7e2d48c6b725c09c6a53d040e257263f8e48dcbc92d8b860bd. 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/BR6MU1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2b8fa30c42f2ecc7532ab112eb23b2e79fc1a2b9ea98fc80987c65d4eebd274. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BR6MU1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6e88b762394e133ea83c9144b779ed875326b1548b2ac40833506b506f675. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BCPTC2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce7a77a97c9fa1aaae385893e5bdc982db6b38a95eeecc51f6a0739344b915c. 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/BCPTC2200016.
Montanha (Sometimes It Takes a Mountain)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24210f7ecd7faf8b462abd416fb78d4340821655552bf1bc543820c499b4cb24. 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/BCPTC2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18ceb90e310a8fb97d637e0ae88281e26389304b479f0e74a01680d73bdfc51. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BCPTC2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24210f7ecd7faf8b462abd416fb78d4340821655552bf1bc543820c499b4cb24. 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/BCPTC2200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a6e88b762394e133ea83c9144b779ed875326b1548b2ac40833506b506f675. 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/BCPTC2200003.