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 0xf587e4cc5cdb9543e950c322124d8d589c4f951b54101cc1fe2f6e334ec6bfd2. 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/5d60dc23-c523-4585-8c99-4a1e1c6470d0.json and https://artists.proofprofile.net/proofs/artist/5d60dc23-c523-4585-8c99-4a1e1c6470d0.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 0x0a8ed7981aa84af44019b499f25c0e66335c1ee47fe0767c8334d4c374830d82. 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/QZDA82044936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac42a533407c6f3886148e7de1233ca7b792267535290983e2c1623cdeb159b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/US3DF2244643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7826c9670e2e80691ff8088f107a26b312e119f12c8ba7f4b97c86f07155ae9. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/US3DF2263975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79705e16c6382bdc67f17c7424290542ade9f85816cd035a78eb313f7d0c7b3c. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/US3DF2263977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c221cd17c3941eb4029192958d878d2c1db04a8a30f83992c30cf20af83389. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USANG2225437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29524a2a78a83b43911958b99179cb9cd2a06fedcee3df63a88a68a662fda988. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKZGC2302977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5447b18a354f6c7ef2b1863ebdb796dfb08e1438380e8ce9954ddc6b8bebf07e. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/QM3DF2215109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f888b2bbdcc37507a63f7cb37add5f7ac16ab9e3e2b7836552c438220f016. 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/QM3DF2266072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee92ee2b3735c4ee8ad91b734e4ad1b7a0e0904c3b41fb43853e03fdcdaacf. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48aab6bb2159441b7344418838c81b6f4f1a278f57222e83131e0e20966c92. 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/QM3DF2266075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80822f60b16de8f98fec4d7f4969ee055d3f242bdb735793918785c832c8f25a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a3f2ec1bc1c38b2007f6e34ccee006ed91e6c08dd5e71241a3a393a3539dd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18e1279901e8d0ef6a4a54bd0b6c2e1a2167bf3b592e14b62063e37a2840bc. 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/QM3DF2266078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29be316ba2018b9ca8e95c1956076e153f49bafc62d20b3a456cc42d4fa580ac. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6000e19457f96165329e5d0ca8fb92ab5d1647a85b80c12575bf161daf7e0a6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce4b6c523788cb93c6a601bd0cc0cc0994792959da91d257e6cf9c1b0b6781. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db9147bbf869cf90b00837fd4a19b101069d40feef80da9dba18a25166d560. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM3DF2266082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330f888b2bbdcc37507a63f7cb37add5f7ac16ab9e3e2b7836552c438220f016. 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/QM3DF2266072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ee92ee2b3735c4ee8ad91b734e4ad1b7a0e0904c3b41fb43853e03fdcdaacf. 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/QM3DF2266073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a48aab6bb2159441b7344418838c81b6f4f1a278f57222e83131e0e20966c92. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM3DF2266075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80822f60b16de8f98fec4d7f4969ee055d3f242bdb735793918785c832c8f25a. 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/QM3DF2266076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb1a3f2ec1bc1c38b2007f6e34ccee006ed91e6c08dd5e71241a3a393a3539dd. 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/QM3DF2266077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18e1279901e8d0ef6a4a54bd0b6c2e1a2167bf3b592e14b62063e37a2840bc. 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/QM3DF2266078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29be316ba2018b9ca8e95c1956076e153f49bafc62d20b3a456cc42d4fa580ac. 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/QM3DF2266079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6000e19457f96165329e5d0ca8fb92ab5d1647a85b80c12575bf161daf7e0a6a. 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/QM3DF2266080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22ce4b6c523788cb93c6a601bd0cc0cc0994792959da91d257e6cf9c1b0b6781. 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/QM3DF2266081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2db9147bbf869cf90b00837fd4a19b101069d40feef80da9dba18a25166d560. 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/QM3DF2266082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb328befe4281e514d5d3705597d9f997d8f02b3c855f0195924bf967ae6924b3. 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/UKZGC2307381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29524a2a78a83b43911958b99179cb9cd2a06fedcee3df63a88a68a662fda988. 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/UKZGC2302977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9e3a1ded9402dd98473c6e6789967cb872e396ced71948a466eeb694a8ee0d. 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/US3DF2237623.