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 0x4778cb33d52275a487d2bdc01edb382f741b02d1fb1e74ae51e0504f7e5b6da5. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbc25a0a-315e-40b1-a003-a2b0c36ffa0c.json and https://artists.proofprofile.net/proofs/artist/dbc25a0a-315e-40b1-a003-a2b0c36ffa0c.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 0xd94ef43a1cf4a34ef10bd03ba81ad964d0378cf9d269fab05eea050c90049a56. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:53:39Z), 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/QM6P41417557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70814e79da1ea4d7ad5ebcab1cf6b82f78d4933e8235c68543a285a46de7ac74. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/QM6P41417558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00d83000e5b745161ec65b24104850749392887d10ac3b45759ffb3523a686f. 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/QM6P41417560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc670f601376780292b4a8f44c8975f50454f23b33997b971967dcfecd465d3a0. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T02:06:19Z), 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/QM6P41417563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecaa97b49db181eca9700142dea42c8aabe61dc1426eb2a709dd3cb92bf15fc. 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/QM6P41417564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc304d822b66d88d36787512417b578950882dd985c4fd66468edf2b93c26bdf. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QM6P41417566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb88a19b7b6e5573a457d65ca90c07274ef3fd510b23d0b9790c4054222f7957. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QM6P41417553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645088d710ec24a3a9a7e55d2792afbc960d2b26bf3b90690491e876083fe70. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QM6P41417554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49aba8cc4d71311e5d31454bdc729c06473214166109ab8ebb3369e9f7815b9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USBEG1702763.