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 0xb12ddba7e3e69a529d6f602d7fd4f8d46c9d82fb71104ed3376c69d76b308c41. 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/d49b340e-266a-45bd-b038-d015b82d6506.json and https://artists.proofprofile.net/proofs/artist/d49b340e-266a-45bd-b038-d015b82d6506.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 0xfea49ad70c1b8067b103e45abc89d486102adfa6d0064242e0a667ca55a7fe1f. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/TCABG1210470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca39961d9204feeffc7abfd36d33bc6d7c5f2407eddff4440cd7787909518b. 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/GBAZC1240001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e1b8d895da8ba735f83a8bc8264112722d7e413e397cd392eb8f85a3cc650c. Chain 2 (Bitcoin): anchored in block 959071 (2026-07-22T01:19:28Z), 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/GBAZC1240003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f7d94f100d5cd2bb9e10657a72600884656ef9d99299ff3acbcb5b2829e3317. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:04:32Z), 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/GBAZC1240004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8e8e7ce0fa7bdeeb1c03e4ed4383f35622826823140036d37c634c537b570b9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBAZC1240007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2348ed8404875a125e278816def8afc16497fedd02e76e4109a90bf0523c4baf. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/GBAZC1240016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671f9b7e07e4422cca3c3178a935a6b1bfdf48ccedca87f2bb6c96d22f2e2cb0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T14:04:07Z), 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/GBAZC1709001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81c985479645aa0caf017715d0d4832c9ee86032a5cce81ba0823e93fe0d09b. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T02:30:58Z), 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/GBAZC1709003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eafc77b9e8bf366b3ec1a543429480282e2f9c77a3d13590ecc2663dab695de. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBAZC1709018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91fd60d335be1d8936d7ef32731ace900393463872d784c399fbc83a3fb5fad7. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/GB78L2500833.