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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ac4b83a605502693dd0df05ddec00b592741dfea97ad40e664907002346441. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/279cdd69-2fdc-40ed-bce1-1f1cde230b47.json and https://artists.proofprofile.net/proofs/artist/279cdd69-2fdc-40ed-bce1-1f1cde230b47.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93aa91dbe185556f889ba5cbb146bc1f83984a328a1db789f747b9a038074ad4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/BRARP0100200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2995b4679e85382d57661c12bd0ccf6cc9a6f4ec1f59bff57a730c1a4a47b64. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/BRARP0100204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa55823e5f18bd0e4d1c46d30bc6c142157b0223f8e3f3a89da4ee2166dd16570. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/BRARP0200205.
O Quinteto (feat. Ivan Vilela, Vitor Loureiro, Walmir Gil & Raiff Dantas Barreto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab1062d1cf5cbea504b2827b5497b9eeffc6f21e710b3723e82ab78cb2c4cdb. 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/BRUUL1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674a7573a8f15dd71a646ae2a4fedc3739030a6d8646b619ad3e38fa546b9d62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUUL1700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a247ea2575cb8415b35470df623f4351d5ec24cb174e70816201088e717e5a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRUUL1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414effd34ce2b585f4b4357c280503470a646a049f0b54f4701ae16639f6ff62. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUUL1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdec0a408d75cbfdebdd3ecdaf47bb2135d5bc5bf2a04e52f4e0d9dba8e20148. 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/BRUUL1700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082444cbc65f7e8d099c98a459612459c053b55890a1a6d7cba7574622c045fa. 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/BRUUL1700010.
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 0xa605ac75dd2ca16c21cfe6a3770610895b33a634ff03b35d9c0a00d5e3f6f4c4. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BRUUL1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c45e34e18d239bef94c0d3e8209be9c757998cc03490ddf90cf856056122e6. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRUUL1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320f301404f01b6e0d5b375b24424aa9d74581c2835215a3340a10414b8a40c. 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/BRUUL1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9717a221270a794db443732a8f148ca6554c08118171b84cbc429bc6ea83957. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRUUL1700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1a77c6c323017f09457bfa494ea7520469f65c124c89670f016a307aee81ae. 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/BRUUL1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e26044eb80d367997f5f2b4035183aff71982e4e8b3470c9c0193c3a53c7b23. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:14Z), 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/BRUUL1800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd9a2c59a555d176b3f9170de8e274249181b3722781ada07af3e70693e5035. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/BRUUL2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe42cc506b7c895a3a25f799da7868841594f5ec11ad9baa68a276a86b137b355. 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/BRUUL1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a91af35b60409cf7b85ab0976a6e189840347b80c0a25267e9cd294073ca2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRUUL1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263873153efacd75f3cd51e13f5f1549aaf1b9c234df2d93bc96d69b0401e598. 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/BRUUL1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c9d35ffe1f101fa63ff5c129c86ce195556ea0d3fc82f0f30efe0edc89e7e5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BRUUL1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a1d1833beb9fca29afc8bd2e00709de4a42f9718f607864a9852b9012fa396. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/BXGTT1500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3654f54983877cd40724a6545bc8400b3ff005cc3b98511cbad716e010e7b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR6V81768689.