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 0x3f833561ad2426c1a4e7f7717aaad5841baee0be4499de05b2e9cc37bd85c3fa. 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/568f9d64-f69a-46f7-a618-32f591a3aef1.json and https://artists.proofprofile.net/proofs/artist/568f9d64-f69a-46f7-a618-32f591a3aef1.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 0xf1dfd155b30b317a637b0dad8113345560a30ce211f5993175de3e554226c786. 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/SGB502427946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb9036d6e7556e1ad78383dd2406789d3edcd76fb72fd345fc9d229a3608921. 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/SGB502427945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56864d4e97bfb0ea27fade494ed4925218603ee2e8fbbb735853c45210ee13aa. 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/SGB502427944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce2a29020437beda26559ecc43711d83eb42fa14b83f6861f1f6850b04935bba. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SGB502451165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x172f3463eb3a7113b4b5affe36cb0d8b67b360e3d45006da3a7ec8eec0476212. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SGB502459390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5b5e338620f8f16c57729f11cd53620bf94a119cdef007a9ebee1f99c2b2af. 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/SGB502464387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5327abab3f2944a512680e65e71f20f59b857a5d5085eb5c8eb832703261c4a3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/SGB502480373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c52cb6618640acca3440ff5cccc7d16440b7cafcb880f3f965f173b0df52e1a. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SGB502478176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x458297a1d8ff64499d0e8820257b315b9275d2d7a9f37f14f62ba6ec9c3ef59c. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/SGB502488351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f65f1131c752a15c103b6588b3b13a5bca9d697e7057702480143cba8fd66e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/SGB502490961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9f123c5cca88165418fc72c9d2334b243ed783124e3fd362b11e69491bfbe1. 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/SGB502490972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9dec66657336021732a27866681b6ebe0e27f2b4dc0a942be43b7bd351161d. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/SGW502404445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3265d121827b7b216307bd08ca7ff240a2328e72286e4292456c6b001dcc08f4. 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/SGW502404439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55da9450368449363e8c87a66a8afbff5a179a2f8d31d6423bfe003fa7a715ad. 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/SGW502411184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffa189f8ee5561b3db4e3be7ce14caf899b01cc0ea070c22549b343841804d3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/SGW502411185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bce9cb0f1b93cbc7c28887b72b66691d7417c76bb30483fe6f06041c8620a8. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T07:27:09Z), 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/SGW502418045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e3f3f81b94d75ed9a91fd043f9276b3b48309677f188e027bf1a90d4bfa5d0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SGW502418046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0c0a18226a9d53bc28078373ad5d1a78923c3c6fa192dcdfd420050052d41b. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/SGW502418049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa916b66c4570c185d8b39d41d71c28b7965d71d17f9ea23efd6894d3afc2682b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SGW502418047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa295f6ca13d86f335717607ffce6971ea5101bb1026d534422a99e1aca46f6. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/SGW502418048.