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 0x73454e92ed5c5e036fc6d4489ac5b314c47cfcb6847b3eda918d60e9dfb612b2. 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/a8aa1091-13fe-42b6-8953-dad5f54701c4.json and https://artists.proofprofile.net/proofs/artist/a8aa1091-13fe-42b6-8953-dad5f54701c4.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 0x885543405fa4dc61779e709981e6541dacd5dc6d1ef714a8e51113ae79d4a112. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/BRUSA0100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe625ba6b31453e1a65e4105b0fad50e295c0214823bae9463c66f95b7dfa9dc2. 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/BRUSA0300329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a90b9c2f494d3833d617659c711d4834ce9631aaa440e8c17e9fc431d0e6d64. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/BRACT1400328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1d26b0ff2ce53d48e738f926afdf7c75afa47faabe9dd865d59a4b49376f78. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BRACT1400332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44171aef887ae25c508d53fdfaa8109d5a0458d4ad4a345a92611ab42c3744f5. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/BRUSA0000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc6baa7f86cb6c656c13c06dc1bb5d7af3aaf8df0ed933edd375c8a678757bcb. 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/BXLMB1700065.
50 Anos de História, Vol. 2 - Instrumental
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52305a9a369a3d8701b4c6a61169c3e166afd806c27e45d215a8d48d8d51b157. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/BRACT0700829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e325cdcd0226e2b5d908f0f569eeab1bdaa5b76a76fd430a57c2ed8176d5e9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/BRACT0701300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e1ad42f694683eeee0a47b358ab6a4e98490f1ce1504003dbb95ad161f40c07. 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/BRACT0701301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c888c5f86eb4c411be903f870782d8a1168801e78decba846812c21c352aad. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRACT0701303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aaa073a573ed29ab6a1113df87cce861fedf6cc3fca3e89050d155923230b6a. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/BRACT0701304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cfd9a75565d8899751984f0b3f06cba7c86fb701a50d66c80380d84bae1585. 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/BRACT0701307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a7a35ee9bbac1688e9383aa0e2a1b9d3faa350b1e343173fb44a16509c7e10. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BRACT0701308.
Luiz Carlos Borger Convida: Bem-Vindo Ao Sul
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c12d85f952820b3f0375f1818efef01bd110db0bb7d34989ae617f9554cfcec. 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/BRACT1603516.
Jaguaretês: Luiz Carlos Borges Canta Telmo de Lima Freitas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2dcd410ff2e1c8e412738beccb80d1304182b85305bdb3250d2ac9062b51dd. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T10:33:49Z), 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/BXLMB1800014.
Rio Infinito Lado A: Luiz Carlos Borges e Yuri Menezes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559794c139dfb6e0b11bbb069310c25c60b8c5481cc47cb515ac88de9c366f1. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRTRB2507868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03cdf4c0d641f6b46899207c494c790b7c82ebdcf0e4d4e4afc792f87defbb80. 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/ARF100900189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3805b62db2fd8a73ecad43f97bf10aa90e041185af538d6ef2c3aea58f7105a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/BRACT1603759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab19f28a5d7d6f2a5da4683655fab204b7e41f9698231f7af3ed16be8940f2c. 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/BRACT0702140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb88e53d1302df6ddc4bd6465466ad03b1dd8f0a3504b7b1913ff5c361b75dd. 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/ARG601013581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038c86f252d667073d86aadc60626125cc3063e3fe48b5dd8b63db6b95e25eab. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/BRUSA0401290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e39a8b73691ccf324525fc1dd91574552ca1f3b8c070669ee5a91392ef70810. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/BRUSA0300333.