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 0x97c407aedb575a9c93f6d1fede463fd0b2db3e33152cb78c482173f2c8713f01. 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/e107bbd8-0d12-4059-b810-267f60f12a69.json and https://artists.proofprofile.net/proofs/artist/e107bbd8-0d12-4059-b810-267f60f12a69.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 0x370119274274e4286b5d3015fe3d6079ee8a5cdaa8200283fdf587cf9f9727a1. 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/QMFME2079117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2546c28864b1f773a5f5a01b08c10f9de922622c7a14671fc6aad8687e678f0. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2179893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1592e437dc3d49f6e2af19ec489a7ee2afa7e72cd65106e33102fdbd53ba03. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QMBZ92184829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7379c7d375d5e926ac0552779df5b201cb6d6fd6d6c6ad4a67ef75281bbb2bb8. 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/QMFME2165749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68de30eb407198da52a248c482f75f7c668e7449a72ecaa25664529b74bd4687. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QMDA62108750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x539a3166ac1fadc242bdb7011efe96b72a5a612437f78adecdad2febc619f058. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QMDA62149441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d34d58669c6f3a5c776ed7819517acb2bf7b1ac3befeaead8b7bcb131c81a2. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QMDA72183749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b58d9b7268716eed56bed28c750fe15215d87bbd368d32c3675019b7f00b94. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QMDA72183756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38345d616903c7e80ec78c0c5d1b5d821e12a5852693b1c8e0c7e750615a996. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QMDA72156340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02d264c1360747f0eb25d1bb395778393a5360bb670c2bac38e1f3d8781edaa7. 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/QM4TW2256428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc68ced1d86677490df5fb56063947f57ed5dd9003ae7b15f15dd7d0e641f93. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QM4TW2265777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9f67ffa26b866468bdf38c392d1d125ed543f67a6984023ee98e910b10e332. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QM6MZ2218640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cd2ccbd11efebccf7b2ea04d11459356c5810babe36f8330700e5ab047a268. 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/QMBZ92235398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8286ff3c89045806a3431a414b83a9348deb368e832bc2937c4175514ad67df6. 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/QZDQH2368227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1880aaa0a74e04693787c937f1f135c7d8aef5dc9f38997bf995e6425076eb97. 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/QM6N22451325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3883194b3f70ef1b68ab7b6087bf7fd82c7b3065c72cd6cd32f129a32a74b966. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QM7282422464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6cdba327271b4633a659fcd2e30f0cc577ad7ab5e119c22e253b300fa9a215. 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/QM6P42472962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2811309bed0713cb51c0c29083b8b02c518cf9fe3548133463b7c3743d1ebcdf. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QMFME2472105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3b38e131901099d45970132d4cf4f4943b3c304a0a22bf0ce7d5c678cc44b8. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QMFME2472102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46d93261e5e32b33edc840eb745e6b7385e67f8eb2082a61bd7fb2e28e2ac09. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4TW2260141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1dc4393735d86b928ac0bb859861be9b7a5e1380d0d5e081880235ff03a54a. 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/QMBZ92195381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e61ba68c924f616faa27f8258c14904b4661697661ff90a52121142a2ad8dd. 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/DGA082340571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ad6f7d7addfb58cd05a5d73585f9f4153324c9f7c3c6b985fadd641d982e76. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/MXF152400827.