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 0x1c9031645b93112d02b02ea330ffc4b7f7b6206dcc4ec3d60ea6f86e0d8e2491. 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/b6e3016a-c03d-478c-8e2e-1f52b8ee1b97.json and https://artists.proofprofile.net/proofs/artist/b6e3016a-c03d-478c-8e2e-1f52b8ee1b97.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 0x9efa07a14368832238ae1161b6a71ab07649f479c8b13c605c3ebdcfa5e0d474. 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/QZHNC2053091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaca5eb1295b953b2953fb7ee05405953d16b9308339971d449acfe2c9e5d42. 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/QZMEQ2086050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6414f02e31e18235296694ad4db65e4dd1c306dd1d7e0c2e81311e8ed199e38. 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/QZTAT2192252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa740e5ebf815f02a8790f32302afd3115633736887de43470d731ba1b7b62d61. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZMEM2279923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4eb89a26d0ebeecf91ef5c9d955ff91acc2efabec360e472e4047080402e730. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZHN32211975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac9bb45b1e85f597b0bc72cca4476ed67d3102a31bd485796cbf1f1ee9dfe5ec. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZK6N2027454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdebd75765c141c7d07acc50a4f07b0955ab14fe9c8df8ea3dea1266f41b83b. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZMER2283285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdebd75765c141c7d07acc50a4f07b0955ab14fe9c8df8ea3dea1266f41b83b. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QZMER2283285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d9759345160ddcee8ee1ee74fc61817058d5e514b2c255c40c06f5453db7e. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZTAW2284673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d9bb8a04f20e8ce73485e6fcb5d8df8faa2ec4d93910833ea32765262aac45. Chain 2 (Bitcoin): anchored in block 957608 (2026-07-11T21:00:50Z), 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/QZTB52295985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f97858d0e78d7615e157187ac2f3c5edb0cfde52b674dfed9c9a03ac5b393ba. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZHN72357930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7caa2551929631bc46d4344680d13d0999599859fc2faa3216970592c6f1bb1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN72406229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4d9759345160ddcee8ee1ee74fc61817058d5e514b2c255c40c06f5453db7e. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZTAW2284673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c00dc06974d7da285815de5e01f81cf6d762860d8781d802c11ef182750fd7. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/QZTBB2412778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a72220418007450b9ee92fb6d83287154ade6f1e72149b7fb94b52035c42f1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTAT2522914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17419b12ac840efc20648f88e75fa78a9769960da0cd88ec8cf3fa3757300dc8. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAT2522915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f783b9b3e07ec64fabc47448da0ea1f7b01ade91c5656c843e8cf840edc46dc. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZTAX2592135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2543d364cb3361f2a2b61103bb25e7251270d1e6e42fa819c58db29a8bcd2c15. 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/QZTAX2592136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7ababf126da9a0aea533f8dc3fa32d1d47634fe9d5f1608b6fde480560418e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/QZTAT2522916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479f71733030f54d270d2bce356c2c8fbe4a7c790566e3a03d08d9c367d83228. 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/QZTAT2522918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb87b5d5da5875f6a4ec0559f00360e56e15953d87a365aa50eb75fa1661a7939. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAT2522917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c00dc06974d7da285815de5e01f81cf6d762860d8781d802c11ef182750fd7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZTBB2412778.