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 0xddbb1597a5f7809658c8b68054516d4e0c58056a730819ac6acf5c7f1fefdb36. Chain 2 (Bitcoin): anchored in block 954555 (2026-06-20T12:10:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ae2f7fab-50c7-4217-b6d0-9fad1d0a373e.json and https://artists.proofprofile.net/proofs/artist/ae2f7fab-50c7-4217-b6d0-9fad1d0a373e.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 0x2745f2b6812b355a0ae3be842217bf2c92cd0de2963f54266019b9208833dc63. 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/GX3Q92188340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb0a336cfaa7a3df568e43ad6690136c8fee95f4da7002b96efce779e28f17. 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/GX3Q92188341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b229b14337b37a917eb776fd7367be202538590e2a0fa735b683f6324594a1. 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/GX3Q92188342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a165ab00a04b09f6e75081a82fc53abb5e444ee5f49763d017ade84cbf92bb. 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/GX3Q92188343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89182eaf3fecf177dda27b594436087636ebf212f52a719b49662f785a4d2cf2. 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/GX3Q92188344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4941d2be878dba4049e581f6cab3465f16d5344dffb073a75a158f038c1f8131. 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/GX3Q92188345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5fe6eef03af3bdd597611109f33c61f330bc3b2654dadaf5cea0eac511bb21. 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/GX3Q92188346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948d965171c79ad213b7b265b202e5e7fa407fc7ce2b6a1e29b4e30abb44ed08. 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/GX3Q92188348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d887721daba443114b7880296901523f3e58ad7642edb1fb9629102612b3f3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GX3Q92188349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x859fa2ad88b50ee9bb3fe487df4dafe6deafc78d539d2b9f7bf83fe0b6e8807d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/GX3Q92188350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4334f4991fd35a41f2bc2feb3a6994efdd4a4399028f264ca0f403729ef0ab71. 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/GX3Q92188352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215ce55727473886aaf24576add7a62bef40205415d9b5cb684a3a91253435aa. 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/GX3Q92188354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dc938370fc1e3cab95a043685b0d822fee1a77302c708f8c1516583c7f7289. 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/GX3Q92188355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd417d6006be6ab36828c207d65a8170351f4d78507f0fde2573a923c7896e6e1. 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/QZTPX2142654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2c631946909bbeedfefae0d1bf4d66a6c704e7a7ba104fbd7d636c91a1a2072. 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/QZNJX2026605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877e5545d63ac94345ef82f65f5e4863a5b5bb121f3dfdc6482b2d40caa94f27. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNJX2026576.