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 0xa933e797c2f3f84af02fcdd8ac1a194601ca965b9efa570e1c9b351a6c3d3a62. Chain 2 (Bitcoin): anchored in block 953602 (2026-06-14T06:58:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0f3ea5f4-72e8-4c7a-a749-ec7a7e7400db.json and https://artists.proofprofile.net/proofs/artist/0f3ea5f4-72e8-4c7a-a749-ec7a7e7400db.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 0xd810c450bfe685f4aa5b9bfca80dec91847c9f3aafbab4785c3ec8f661507b39. 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/TCAHM2358238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fca7ce52f5e2a904c9e0cdab35842fdc54b55e40042d2649105284996e35617. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAHM2358395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd910c01544688f53062a5f5898c89fba8873608770d061f3d5f32778a7ddab6e. 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/TCAHM2362760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc4dd0fa966f428c3e47741330231d581c7b1c2992038a47c8efec6744b27a0. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/TCAHM2362864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc365698f41e6337e350e299c7025c551233ad992201e0b3347527b3028397bb. 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/TCAHM2362891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094429358fb519de6d4b679324421f03c9ea79da15864749ffb5ad2b7ded3726. 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/TCAHM2363060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfcba5b00ba11b2c404ad727d35d40276a557462fdfa63f15296ada97f49269. 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/TCAHM2363075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307c294ba3f198be7c4b0f779d3f8e5dcceeedd581a93650f60319cb34182477. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCAIA2410976.
Nuevos Estudios Sencillos: No.6. Omaggio a Sor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd9f1d13fe373cbfffb68d1d00877a894bd1104afb2e0e579de3281f570f431. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/TCAIZ2409653.
Nuevos Estudios Sencillos: No. 8. Omaggio a Villa-Lobos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f9f803ef2144b80343269b9734ed9948c7eea530ae925cbdd374b638e08287. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/TCAIZ2409673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c219eab584ba2c0ad7e3c7e38471536e69cfdc783a8c158fc6ceb0a0010571. 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/TCAIR2414465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90208e0bd9d46a514c2e86c2b1516f6d0d014925c4a6fce6e863362547b4d6b. 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/TCAIR2414474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafc074e743b905b560fde6ce890921c3defc4b3b5c01c73c20a4fcf07de432d. 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/TCAIQ2414484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0be151c17a12aec24b2b9e19aa1f432755e12e1a85be705a428b267c2954781. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAIR2414497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8155b0e9de8e03fd697d5b533736d24f71c753425bb9828faedb45853fd872a. 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/TCAIQ2414506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afe0d53cffc2745e370a5ae956d1af4872919a07a80e8e51d6ca3586203a366. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCAIQ2414516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x250760c0d4faab061b68c5d0d04a1eb50229f423f7a21dafacaf4cf70c90f22b. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TCAIQ2414523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a350ebbab031eb95680db6f7939c018d594cf3d0547c688d46682626aba93. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/TCAIQ2414534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab705137f3358eb1ce2da7011ee590f7c303ce9b3311931eac154f44a673fd3. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/TCAIR2414541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b681f51744a13ea16b3968decc45b07aa7fe29d7ee2fb983a26349774a09db. 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/TCAIQ2414548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0952a69fe693b6248ed59ebc13bdb8356871e163739b3fda9a5135eb827d7325. 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/TCAIQ2414566.