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 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 0xc27dc6abbebd60ee52176b984c4b93bc0eb86506d7187c061684a1ccdea966f2. 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/1972adaa-cfa1-408c-86d9-e201693476b0.json and https://artists.proofprofile.net/proofs/artist/1972adaa-cfa1-408c-86d9-e201693476b0.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 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 0xb09531de276e5bac6edb68a0f5a5f8d2672be91c107334aeea84e3a7e4b88dfe. 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/INS180608212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f924e4a4cb0bf43eb8d486f4b7b704fcffd16b2c24c97c64229ad1decb155d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/INS180608213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f835427f8db29e6ba69e613ef4504190c1a53d6739a40d913d3c3cecbcbc364. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/INS180608214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3401298c3463015069eb6f73af8ebd6aa8f933dafa170a47b8b8653b89fe9ba9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INS180608215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72cfd3ea1c05cde78fa0090cd41da17b0f39b78f968a64482104d97a431de76. 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/INS180608216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af79994101dfb70f62f14e364da614bf9113fcc5a4dbd782bf3d7f5f6620cc. 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/INS180608217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d25e3be581603c3d053687baf779221d6faf001acc3d9ca1992875510899b5e. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DGA0P2447734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e5586ddae297a68a5dac083b6435a500d689832770f1b8b9b529aa8438eb12. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/INS180700670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8d830fdf9549b2577ffa1f0077247173aeb308af9d43956156315f19adb788. 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/INS181402018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f5fa1fa4be02675b99b68250a58453cb2718057dca1500d307de1d58d726ff. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/INS181402019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b8565005727fbeeabf2f4df6d75d570914d7ccafceadf3e335f7a3bfd5b883. 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/INS181402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6410d979acd4a9bafbfe687df31c9fd491655915549c127e479a2d0f3a1cfd37. 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/INS181402021.
Apni Mehar Kar (From "Koi Bolei Ram Ram")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ea092275c1e7af00cb8fea5b7be7b5728dddd5ce7f085bd3cc5cefc4f235e3. 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/INS180606865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a454890d1f09ebca2bb99687cf12a9df78808a176570ba2b3369fc6e4035cd. 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/INV422300930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf05778f5c82d330cd791f26a674c7853b686269c93ac0fcddb5fe0db3bd222a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/INV422200765.