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 0xff727db2c7be5564b8ecb4f7947d602aafd12059b11610ab3896091b0433bad6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e92a058-9687-4980-8c91-4faecabe6215.json and https://artists.proofprofile.net/proofs/artist/8e92a058-9687-4980-8c91-4faecabe6215.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 0xa68889399bfc454a488f29e3cbf5b0798680901151ff84e04e4a0627c7991dc6. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEQ121428140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3423e81c6ba12a3371098d37a99afaea7720a8b855bdf5d2ecfeca50c35ac8. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEQ121638621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90825a9bfb6808809c14b9d5283e847e4668b2353cd3a2e293a95ab990592d9. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/DEQ121638625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4010ec915567e6a5091b2a4514cfa8887c775d816bf3bf8c4cb38d878c73b5c1. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:16:20Z), 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/DEQ121639093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x691b71f9921b99d6595a87bde710fb5f4b8616b12a5706c157046cfee5579087. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEQ121639095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a2b15d17bc49303bd50ca3d283f097632ec3bdffe28148239cc924c516a510. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEQ121748444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dbe286fd993d15a3bef1f832c45928254594df537c9598755d0d3c02421849. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEQ121748445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87a0b68eb024e05107c03f549e41f396a90353948ab57456fe990e331e096094. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:21:59Z), 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/DEQ121748447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752ea0e7e8c6d63ef0760e8907ae05b5724a71a40e9f69fb1fc12700702971b1. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:18Z), 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/DEQ121748448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08efae49a17cb0910279676461015c6423ca23cfebf59e4a2da1e9026e52e52e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEQ121748450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c02140190c115cb710ce854cd91c85d385f543897729100f9cd2f4fd29d67b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:30Z), 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/DEQ121748451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9d11600c9b6322e428863236a32b6abe9fc2bd71c7a94802061beceba6af0bb. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEQ121748452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc80486734e8bd44247494f2afad31c9f2a6bf24f727edb1f7836c1a135be6b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DEQ022101803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b870dc736aeae8312e10bd5b1568ff4f463f564871d350249959a0be543e52. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/DEQ022101804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5b2afca7a3296546ec0d73bf6a897a50317c1884f00db48ab24086c96fbe14a. 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/DEQ022101805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe30eeb36f49b5539baf34ee4f99bfe4312177ca36e4461c301f71665581e66. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/DEQ022101806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6df1591c1d8a8e253a5aecd0ea8e845e449bfed42884b22dd47995a93554e435. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:27:08Z), 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/DEQ022112344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4103f248c683745282c99c11dec2c6503b546e7b8d30dc7569cebecc163c3c. 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/DEQ022380589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da8e85dbea2417dbc18ed96cd79a1a395f45aaee269d942b33e339286bd7096. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/DEQ022380590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81744a3fcbce629154a2f6ea98772d3c3829a660c0dc82886ab86025d2d65706. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:33:50Z), 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/DGA0L2344101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df7d618969228a8dfb304813650b1205c300e868b2d95b0c394d33c23f1310b. 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/DGA0L2344102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x961e29d6089207956e8822ba4f8fcd43eb4285dd45794e38ef536ca5bebaa877. 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/DEE862401885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e6b086e2a388dcd90a9279d327f68c92807ccd57464cafe4ad7bb96fd0fa11. 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/DEE862401796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6058a532c086ee058cc9bcffcf178760fd29b9b993e891c2fcce670e502c397. 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/DEZC62275443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb808e56a35ae62361e15023e077f15f77a7fd57ffe741d6c10c0a998e807a787. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DEQ021800645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe725f3ac3bee4fb3964f0a4a266170f5451fedb6a20c05a0f0215b8b450575. 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/DEXO22205718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8317133b34e7e9b3adef0474bbbb84df95281cd76572f289ac665bacd8df2057. 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/DEZC62438738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8024fb00948489d71bcd124195ea04760aadfbe9286104f6a5cb3c137fa53e3d. 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/FR10S1790643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24ce1ca47fc111f1ff443384a496a0d222503e6fdfd8bea2fa74bc0f3154b963. 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/DEMN91400201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87f0f4b3368c63abf24cee08f1b1d95dd9e3b4043ab6d9c1de531511e427b49. 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/DEMN91400204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69525780962d235e23403dfed576a029c2b5f55691966c39917bb596dc0570bb. 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/DEQ121831004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f0b5ee5775b52d1bc3760bdeb00f5ec8d2ae05a30f497267bb7d59aee24f441. 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/DEQ121423286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81446840d606e2adf578e28c659731a7eac7c0f0318aaeb77d2f50c57f9b0d2a. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEA621901420.
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