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 0x134cf112e55fe39d739fc7bde5687a72980973a3951f37c9aa93f9e27a46feb3. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9a0aafb-1ee6-42c4-8444-279c158d5aca.json and https://artists.proofprofile.net/proofs/artist/c9a0aafb-1ee6-42c4-8444-279c158d5aca.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 0xd26300a29ce8064a700332be94f9f66a4b6696c4646260f3c208d7ac8fd64b1c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZNJY2490549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x941ba94966d55e3f7339595a3e4808b99c7d7beecf0287f4627442306a260319. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA112559990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24bf20ddbaacd4d77fcb724fa73f90f52c1051a301448346c153d877f823d9ba. 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/US7VG2582754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc975627c4f444426fd6b7b67a924d962878fb49762ee8517c146bcda8d8c54. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/ESA112559351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d973ce90e9fdbe4a5945493e2cc781b28f131956837cd52e5e912365eb250d. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/ES18F2400690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4631b1b3cedc48f57ffb4add33d4f81eaa4f9d2b2e7e0844ef087ef73b786184. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/ESA112453273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99aae343d5826a2e3a227056c3173b2143c99e43fe7858e4e8c146effcef9e86. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMZ92599445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e801f88858ec675bcd66552a73d6fa48fc736cd72a8869ef6182b3dc685de66. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ESA112568978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d9c01fefc51c0fdaa22fc2ca9506e941c0a43c4f6bed7347840928e3ebe2de. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA112568377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcad6d7f8a0c72583df135cdf6e5b7b0cec37e9433d1d107e51fb0de10510e99. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES22F2500195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd3de6b20c82abe84848b3027728a00da32a022800be5fc013cb5ee31a4accc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ESA112564562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89365d6654cacba1d7be767a41dbb48f11cce8a0ec2c50367286114e7cc79013. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA112564566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0078f1397dd669cda0756321e7b64eac3d4c136b459a591cfd0a2ce6f469b20. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/ESA112564523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d85b95c128e3d6ab9027c077b9450696cf30471f74d2044e83297488e32d1e1. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ESA112564285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d7726547504bf5c1dc8f997aec8d3327a4816611e0de6872d37b39ad368e89. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/ESA112564102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3de77953a27f54104d05eb2348e57d1f0320223c92715a67b47d3755b0e970. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/ESA112563923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8faae7b8d9836cb13f6e7f69fecdd9d47016fc847a4bd692ad9016c6d9a0e443. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2506368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e57f8290f450d3479d4928468d5908858f5f74eabda2327bf625bfbf81e4c0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/ESA112560885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ee42ea25a1b25c5eccc3bad2b0164f85ae4bdee04e1609625d25c3b36c6e3d. 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/ESA112559030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e2545bec47c73de96da332ce43f1b79a1e4c6e0512cc548fe56b451858dc4e8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BKGJS2300149.
Sarra na Glock (feat. Roubacena & MC Thiaguinho do Recife)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9bea29501813517c9cc49f1ec5e216d5a626de6c7892615639648b0f68fbf0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/ESA112439354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e873a8b8902b2666795b7bf28866fc844c306e73cf63c0e97aa068efb7b808e. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZNJW2440183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba37ff07e0f202f649989f8c5bee6ab59c2b5e27f19be2386651f6ea2c406fe4. 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/BKGJS2300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ea4faafe9ef385416d9ff8f9c727cec1cf2cea1ba19c70801ee955fe83324a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZMZ92411015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320e8e8218e8543a03a25a5ad8d4501ec4461863e9c73c626baf92f1e51687f7. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZTVM2478690.