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 0xff5655790a7ddfd9f3ac7d35ec0c4786b18a235551c97c381f37ee9d5c9fbf18. 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/c1a8d415-5066-4618-a85f-7bfd1a9ad2ea.json and https://artists.proofprofile.net/proofs/artist/c1a8d415-5066-4618-a85f-7bfd1a9ad2ea.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 0x4f2c25a0350d28f90445dd93c6930f7f73603a4e01113d82bb948a4b62e43393. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:44Z), 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/QZHN92000977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1d334033f7e99ea8aedd405b022acecefb420cf2aea86af4fce23fec0634a6. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/USANG2127414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e999728614d140d3f31bc35bc4073f2b34e20002d72fbd87254c9a1d932e11. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES52218792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b96f03da143bddceb03e0109c87f31c01c896f2bdf19ff3723faa6bc1faa0f6. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:59:15Z), 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/QZES52218793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f4c1484a1016433fb2089ff91fb2938a2b173b1cc56353b7014c4d829bc4bba. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZES52218794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a458292497024bea316df2262d64942a3d8c8b9561cca9fbd6e87b1ab74fdf1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZES52218795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbec99994f3099e540aa4b7b24ce1a56b1abfee2da9cb2c3b4fd87c8b54b04b. 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/QZES52218796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a90b034917db529ba4fb66ecf1ee4268c63b380c0223692e0dfefadec474f17. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZMEP2302240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe967b5a2e95dfe16b8a85cb438b048c188574184a47c2ddf0cf6eb75a823185d. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZMEP2302246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e6e65484242a1b95dd10a5de3140f13b57470e44f50dd9ca58ac356f240b09. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:00:15Z), 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/QZMEP2302248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde90f3f8e61c0f14ef9b02d21990438887eb134112e5a35193476ede6657e0f9. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:32:56Z), 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/QZNWV2336563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce6d8e1eb158946243dcf0d5ddc829d13f51141da6d54f38bd9cb039e8493d0d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:37:08Z), 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/QMANG2202227.
Popurri (Alfredo Parra / Hombre De Negocios / Los Coroneles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b2eecce473fa07aaa7347025c76610dee25d0534f75892c560bba620ca3c73. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFF2363226.
Escuela de mi padre (Sierreño con charchetas / norteño)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90e9f3efb050f8cd2298193745e4ae6a7c748fc90809cae11486d1ae86268d2. 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/QZK6Q2591691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62945b97b2b2f3ac10ef1f3785650d4b77635dbc8390a18f2400335da4c20cca. 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/QZWFN2316520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6977ac1ad7625ce44c769859a7de0f369ed4c80474ac914aa2266626c6d7ae7. 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/QZHNB2002958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682d3ad48c2e4aad6dcdddfe97c09f1552c08a61acdf60fb6359ff4eae3aa0d4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USANG2156080.
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