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 0x2ad20613bb08fd8d3b2cd11e476bbb97d7d27457729c3d526f9fc4e172f0781e. 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/355eb4e7-6b60-43fa-8bb0-49f679371e4c.json and https://artists.proofprofile.net/proofs/artist/355eb4e7-6b60-43fa-8bb0-49f679371e4c.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 0x61d2c16fd0c05e5b19141492ae377881e30e08b3ef34fc35aa19b6b3d2985372. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZ5AB2057629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b8eb3e761e769ce4584a3fc9d19ec425a9d39759263f892b9fc9fbe854c4bf. 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/QZ5AB2057635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf9a7aa05aeb72be1664fe29cf670b4c0032d7f086f5c8d0cb04471045d6d104. 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/QZ5AB2057638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04aff03f04990f3a5de03d7bfc4315f97f5109943089b08935019663a31cc837. 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/QZ5AB2057639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d031740b7c841083d338276a121859b6d5b342ea87181ae15fe4acd0c9c5fa5. 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/QZGLS2167634.
O Mar Roncou / Exú Quebra Cabaça / Exú É Corrente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7c4f204ebe2bf1dca403220b5d41f43bea991d3e42d8dd1b60882129620d22. 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/QZGLS2177960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe952d4d83d9078563a7b1e7b06a38d6114f68fd4921bcec8fc845a3e0fedc627. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZNJZ2304809.
Contas do Rosário / Quem Tem Fé Tem Tudo / Pai Guiné
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ac632c1f1b19ea505bc7ce2ad17de33fa8c5565df7dad4ad0c4cbd30f87b9f. Chain 2 (Bitcoin): anchored in block 958731 (2026-07-19T12:35:36Z), 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/QZNJZ2304812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1684d9b0f14507774f01d189f344ae6ff63d2e7d53217d6bfe59cd240ef82ebf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZNJZ2304818.
Meu Cachimbo Ta no Toco / Minha Cachimba Tem Mironga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4adc1d963c527525f88371c2ed933109ec134c27139115a152fc2e20c7c8b8f. Chain 2 (Bitcoin): anchored in block 958681 (2026-07-19T06:14:54Z), 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/QZNJZ2304820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7402ac8645e644a4b1ab804380162ab3081d309b44658967f8c4cc992954478e. 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/QZNJZ2304821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8fc0dd84ebe323a7e1156efed2f9f738f0c0f473c1af58c8d524e872fcd688. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTVM2305948.
Exú Mora na Encruzilhada / Terra de N'ganga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31af3e59110184c21bc005fa226a5f136a8d3edd630971af262422e4b49d65da. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZTVM2305951.
A Morena Me Chama / De Dia Numa Linda Batucada
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb50922f16dd76db02175249da60d7ce25aefd360375facac382af5e2ceed8e6. 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/QZTVM2305954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e93ab417945238fc4eaf80e281c6029f851241827914147930822053c696174. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZTVM2305955.
Como É Que Tá Mirim / De Quem É o Galo / Exu Mirim É Esperto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2750786b2cc1a12df537ed57fe6b2d3900bb508322e3957b8589430be5f3eb63. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTVM2305960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d387cc04641494c3b25d2030e1c8a24531889774581dc1af751db79343de14. 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/QZNJW2524675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22d06d13f34762c0939ef902ae9a545bd8dca8660fdfc11b5cfcd61c5e01b54. 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/QZNJW2524676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x634a11c2994ed5cca7cddc687009e8f5bf2805049c0e74e6336b72fc0b43b496. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJW2524677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36d9abcd9ae5d0ce424e3ab8f778f0794374f5a95206453b277b75ff130abf2. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZNJW2524678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80322c6ab26a677ad1108e0e05dd98415924e4c58b4bf234be30e38e8746291. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:35:17Z), 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/QZNJW2524680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5785ecc5b03960f1a66ebe6c81256822205ee25d52b96ec8fd5644ba34afc30. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:18:44Z), 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/QZNJW2524681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915467c44da648eb1d12d8fcd5b517b743e1a7a83ea6741d9811fb07742c05de. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZNJW2524685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7ed5ee31e9fb442bfa424648476b815f6978393035b14924397a2cfe2893ce. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJW2524682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40742b4d4c21f2383c2f23ab3246759ee0e44bca9b170c48b2d24754b2aff7d8. 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/QZNJW2524684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ada19e20ca330f05db09cb0171dcffdee3c2dd3ea168bfc4513b446d1b2cc8. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZNJW2524687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef108f6e9bb3df07fa193b259111a18543207c361172b49ad8eaca36c29b5fd7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNJW2524688.