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 0x87fdfca17c3ccb040af55fa9b96ce3fe16d17abf3fb773cd84a6c3c0f736159a. 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/f6ac43da-7024-4b94-ae17-a0d8368aafc4.json and https://artists.proofprofile.net/proofs/artist/f6ac43da-7024-4b94-ae17-a0d8368aafc4.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 0x57a64335736d692d6f62632a8f4eeb015bf3bc89a57cb701ed4c51b71f4393bb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZNWV2144562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a54cf7505c5388695d4d9f6a11201df60eaa91fad8e988239d6a9e4799e7fc. 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/FRX452211575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ed05ded56a1dceac7c19861c417af1523669b2ab6d1d1427010a0d4e0b5ca. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUG12206150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x951393336d3fe115527eb518113f8d82f2799a5cde783bc786457b87989964b7. 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/QMZ4F2262912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd64cc22f8b1ca36d9b801a0239d7d90c6f1bef0b4dd93552d5a72f0ecff95e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMX7S2394218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f10c3bc0876d6f955417b3376627c3058b4277a0ebba580b3bd80f6078d6cd. 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/TCAHY2461082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052d19e49d04b656f4e59dc08082e5412f03bb271f05a88c27738547d980138b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BK4DA2543898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b4ed05ded56a1dceac7c19861c417af1523669b2ab6d1d1427010a0d4e0b5ca. 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/USUG12206150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b45f02664dba9590dc33d19179aa86ce0cd2509bb12795790d825f0bfaafd0f. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:15:01Z), 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/MXF152301653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6431da5735425486de3f45e7c9d12b233e5b4e66ea4e9a70517f50b71361cb6c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152200433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb00fe73970b769910f09bc6d9bc5241aeac6ecb5f6bf1ff9e2244b4bbfaa698. 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/QMEU32207250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880c5e09b68bcc0e51b88f710f763b0b5a51514418a3c551a687a03e8495dba2. 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/QZWFN2390087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02e24a21dc5f8fae464e3ec1dc86b05bf994342303c82b0e5701d7c4b93d49f. 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/QZTLA2423345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8430752b0c5f30248f1b37edaa1ddb6d31474a1a3c0a49723e4227c2e94120bd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GXD7V2541960.