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 0x9f9d7a973d1013a65f89ff3bd6e1d224e0f198d90471b988a77054ead5716398. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa0eb6d6-336b-494d-a597-2fafe6be3b80.json and https://artists.proofprofile.net/proofs/artist/fa0eb6d6-336b-494d-a597-2fafe6be3b80.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 0x9c1eb39cdf01783d954936529551d6af133793eb2861d0e689653972a70a6724. 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/CAIFZ1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x768b70c372f0218a4fc26e87e38eabb3d28b38d3104cebe0d4f1d59159d36ad0. 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/CAIFZ1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0aa1c8df6f7f77141b39f54a287d06aa3d50874e641a3f7ca9266c83cd4831. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CAIFZ1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x505e1950380e38d8143448086e9f33ace571cc5617f7913f1848aef127ce4488. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/CAIFZ1800001.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3521e6da2354e983eced891c89020e36e6cf06989101a10fcadc0a3a98684f2c. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/CAIFZ1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261db2dec83c35e4b644bd00aea6060f1a53c592535ed52a2d00c248a704b0e9. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/CAIFZ1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70fdb5a650df101896f051c7ba81a9010ec517ae8ed6223c3770b2404837a248. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/CAIFZ1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440ca9a1a38575f988ced5b0da52c3670bbd7de14b21c67d00d867052821c895. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USLZJ1450331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0136fe0dcabbde2dd88e20be5a9156bea51797394a34c3cbae26debe4a53d6. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USLZJ1450332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9c9889a80904eb3acd1855f0296bda9cad070cb7c16541f4a502182aa313d6. 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/USLZJ1450333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8baea4777d0b18408d510fc5967d55aa6dc8bcbdd560f6349ecb32783af77fa5. 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/USLZJ1450334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a4e82021753491b6d350ae3964fdaf38b24a4004e78220d3dc729f83012ff1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USLZJ1450335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbcc1e0579b897e8ef9ee980e2e849964990572f33e87faee5897dac483239f2. 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/USLZJ1596715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa18b37873c6ee5c6f4e7464652a7fa9fbe06cddaf9627debd52ef6f9e4d0df. 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/USLZJ1596716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd270f4796903e783d5f4c4c67f525499d5901269d9ae614535a32830c3614ff. 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/USLZJ1596718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3abd88ea0fc1dc5a97142559beeeee0b3a403d091b9515180becf8d1c1008cb8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USLZJ1596717.
Coda (10 bonnes raisons de devenir un céleri)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7c245c83a3b861d8616b31fd80342e218088961284413d38c4a21b92c06a11. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USLZJ1596714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6060f7e2e6b03e8e6bf72955f9987cd009178cc3d34a910e7ac3f8b4b55eedba. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USA2P1918632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7b77770a7301711d7e3828f5dc854526f6e77a2a63f164bfeb41c7a79969f67. 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/USA2P1918627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6dfef4738d3bc30e3368bd3e44bf490fb583cfe03fc8484f2013cb9df4c77b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USA2P1918623.