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 0x06ead86050894925a77d1b671a2b6e327ae6906e37c06f23aa48bbf64a52f398. 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/afe61c8d-67c1-4366-8b26-c629a915111a.json and https://artists.proofprofile.net/proofs/artist/afe61c8d-67c1-4366-8b26-c629a915111a.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 0x92769314e3d6b57c9e501d2f1fe25292c98acc6a38dbf14f69582914c88c675e. 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/ARCS91200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8217010edf88dd66a0e95080e306686494e541acf0815f831fea0640308f4c5e. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:27:47Z), 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/ARCS91200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb694495f6b5e6a12d51d494c25b25111ea1170e055384b49cdb4e4cb2376e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ARCS91200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c55d0d4c9d7cce60b50e7181f3f2b6ea04a27f8d5a7dea32a27a1017627c9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:15:10Z), 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/ARCS91200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92769314e3d6b57c9e501d2f1fe25292c98acc6a38dbf14f69582914c88c675e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARCS91200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e047e77b43e04ad1c7a13395989e8e723f1145dec01fa295cc880e22139c139. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/ARCS91300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99dbfdae1429d50bb9da0c541fc9deb923fde3b4f1fd2f7792ebde6d1b7905a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARCS91300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31bf4690cca1afe49e0ef31090cad8d423d63484cba73c8d64c124c1d4d6bf3d. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:33Z), 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/ARCS91300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57727320c9aa62417cb0bd0251a2040a653490731ad3b777da9ef00825902e51. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARCS91300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa38279a0b2ee492268cea1c67fdfba4c41d5477f6127c57d41eb92953f2495c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ARCS91300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0de872f3554db0aac28e8d8182b0d4938741eb7fe59359ef1b8d273ecb12d28. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/ARCS91800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98704f0bf5c7c22e2fe1d0f5557a2288bdaa23d7a26549b0085be4b34722324. 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/ARH092200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb98704f0bf5c7c22e2fe1d0f5557a2288bdaa23d7a26549b0085be4b34722324. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ARH092200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8604ca41791a17818c332d92994aac764dfcb5d596d94a75c6f0f0c93478b94. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:10:41Z), 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/ARH092400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729b14d83614d90af2d624033216eb2b5024fec43c96c31ac662b121ba013ff. 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/QZHZ32134330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5729b14d83614d90af2d624033216eb2b5024fec43c96c31ac662b121ba013ff. 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/QZHZ32134330.