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 0x8097a4a50b0b6cdb339994f43c08dccd2e990aa3a2ff64737ed1796777aa6c31. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3b5b671-ccbf-4222-96ff-4639b5564487.json and https://artists.proofprofile.net/proofs/artist/e3b5b671-ccbf-4222-96ff-4639b5564487.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 0x85ab5b8ea1d18ef58997e1c2c3a1d54f1a40584b2c9c746976808f424992d3ec. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZGLS1943788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b1b09785339d4ecb3f3e40999836333f81a70fee5229227c1633f9c5c6fb6c4. 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/QZGLS1943789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79714f4d603f9efa078c5d61242227d20810eb903d751f202ca769b95ae7ec32. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZGLS1943790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a35e26ffe1c7e85ec80766ce8d250d729434544e6026229615fc7b21a300409. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/QZGLS1943791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff931b3d417de5b6af732898af4b470ec64524fbe547ed501fef0935a7362f38. 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/QZGLS1943792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3b2d7bedd9780890e86e26743a60526d78c05e71f54a7e02aa01f81f69891b. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZGLS1943793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0167dde888ef758e40e541536e9db32db20d52f9a1974f314af968211e5c19. 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/QZGLS1943794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c85697dcad1c709840c022a53bf41352b55f41e5252e446873dc251113967fb. 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/QZGLS1943795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5b65e01266e393809b85acbf871568707f33b557b7444eec5e189b1ab12250. 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/QZGLS1943797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fddd5f88dc1be6ead3ae4d43971f55bbdd0f33991369a8e15009b3701a475a7. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZGLS1943798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0a49c765c90df304b0079dcd264542e3dc4562264ea206956fef1e4beefef. 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/QZGLS1943799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f7b9b9daafa1728d57cd5b26b3e53eb4b123300f49342b7f3c64809af0d37e6. 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/QZGLS1943800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb41b240fb10675ad3d324ea039184dc20188702c6b26e88f76c7554672c39a6. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZGLS1943801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e52b9065bc83d2140b85ec82f2e9a1fd559c3d6149fe18e58de48475a2f651d. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZGLS1943802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ceab450bd6d2ad437f9a913d7414bd5a7b6996cd991a82d6edeb70494b5ae8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZGLS1943803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7ebd556f38efcf32a397b935aea6fb4f18e17be6c904b1c9af03089fd24b2a. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/QZGLS1943805.
Sempre Te Amei - Ao vivo, Cover e Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a81f4d4f9aed23b06a93e3d12a407b6ba1da57d4b747f3ece8d344883b3666b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZMZ92544070.
O Nosso Amor - Ao vivo, Cover e Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93b20d22308f687f2d7e064f3b63a322ec56fc55113740242560c4e06885222. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZMZ92544071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac787e2dc859d82d5b994f6382a3bed78f3ddee7e86d17824155fbbb76c2c45. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZMZ92547499.