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 0x40acf63aa0eb4aad8a8faed8b0c0cbb8e9eb599ef4ec15d56eea4a8e8d15678a. 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/0ecef007-bc3d-4816-b9fa-ccbe1ac08a9c.json and https://artists.proofprofile.net/proofs/artist/0ecef007-bc3d-4816-b9fa-ccbe1ac08a9c.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 0xeb6ce8a71b7a1c71b7e43c08b3c485469ee23f754e906d5915ea7a8cd1db3497. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM4TX2071201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6620686a8c499ea19b4fa73e57484d22b8b9d015d8268fa9185d78e7a5e77993. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM4TW2161328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3402e0577970746ff227e2c323c7a451fcebb5d48981cec2d785e5848465b584. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM4TW2104289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d000f8e921298e907e5c819d68881f2accf73d70295dceb074ec5cc3f866f7. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QM6P42034919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3428c532c174bf9d0daef769508200273c46d0b9a3d3c02a8ee84cfd4e52aa35. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM4TX2228728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3c8e644d04bdedffb388330e3cee55b35699922c28dfd777365b25f96dff74. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6MZ2221153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce94be3fe3317de5def735f888f3236bfbaa65e96cbd55e4752eb7ed8be91098. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QM6MZ2276779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67ef4dae6093c1eb8a9caf2fa4ac6a8a9e9ee1d23816c6991175966165623907. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/QM6MZ2276780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe282ef25829e0dd5fe659a44142e0176d8fcf68d7fe06013348bd1bd91da0c49. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/QM6MZ2276782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7096fa7eb5cc16a3c66a5855ac4c06a69b1e62a5ec2f8015363b606007d663ae. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6MZ2276783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf323c5a618cbdfd7679179233ee0442b5708fa980d572f789321d198d94fb596. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM6MZ2276784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1c876d57c55c18dfc9b3f98d0ec5bcf8e5ee7ea7635cfdb4b52bf8622cad561. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:50Z), 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/QM6MZ2276785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x450302c30accc9ae325a69613d091635128f11854c7086fd75c86333ffd59ae3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM6MZ2276786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937d5eda0f96e425d441ae264bb114b6c210403ebd261ddfc59bfe67f9d1f132. 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/QM6MZ2276787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb30789bd90bd2a480c3282729d2362d563d3542d7fe349e40c70a5f9da13c1d. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QMFMG2356460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40dcd1b6b5b221ff3bd464c7cdb455dc5328d1502353b84baabd89dfe3aba38. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QMDA62421655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b9118ef7322d9e7f2fd2402d1ad1ca36c0aa1766bb6ee0f305552d7673cd89. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:25:55Z), 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/QMFME2318270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ef6475c2781c6a5db1f25e211b1ef290cfe765b5769fe0c80aacf752bf13c9. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:43:59Z), 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/QM4TX2498384.