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 0x1b7faf95b772bd50629c4603097f54dbc2922958c05c3958baeef1bbef6825f2. 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/69c2e02f-982c-449b-afcd-13249a450123.json and https://artists.proofprofile.net/proofs/artist/69c2e02f-982c-449b-afcd-13249a450123.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 0x4963fa10ed56208445d3371a9bf35a9e16d542f1abff8dfb54d44502c07ecf6a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CNZ612000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1523c104aa5babc321029a35fdcab569db34a538a3a6f2bce6823c07354046. 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/CNZ612000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb11261dc9aa6fa6ed01f38763fa4d67f160f86aeff4b5384da64207a81ed73. 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/CNZ612000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb49a38cbcee100c1bf905f2c7dbc20e9703b0ed9081aa65c778395e0ace069. 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/DGA062243019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf727f715b22db84315915a77daab28e225f5b9f56e1efef299e037ea7d6b6e. 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/DGA062243020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7945d69af761db4802e37858936968f2022166e3de9c529c3b2010ae537f8c. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DGA062243021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79efacf7f7f54547b4c2c9b6410a35d5b8f4e978dc20a3356d6dd330d58d956f. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/CNUM72300282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89638e0d49ce508eb2cd9999f56bf491813fdb301b6883745e3f3f98cbd67e6a. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/DGA0S2477484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3928822c92a28e4de52e247b6a5aff8facef5257bdd4d6d9fdf4fa4ea0ce7f0c. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/DGA0S2477486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1f043c2ba64d89e95060ad4b1ea15828207308e57cb84068f6d54a5760f5f2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/DGA0S2477487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f285d16e6a72d3062c1199cc2d55b513eda792840579b9fafac08792077892. 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/FRX872145396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde0e389b5cc958d8469f0fed31328a7042e49bb0982a43a28dc4eda4b3fea89f. 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/FRS182160861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce12d519e54c9de0f3f082c93772ef9b4b118f91ecf7eb319ccf32b2e05197b. 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/FRS182167214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0988e552b1bea2ce4eb7010bc24f24e4d590992f9473b24b265ab61408512c31. 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/FRS182129456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3156f5a6e060d65a910d307271a49d6adb72481fde85bd7d4596bf2b4e631ded. 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/DGA062236712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50661180136ee40714675c2296275295b857a97a03ac186283d593175162e42. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRS182129449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc8d3a2f5606a677206fd4dca6be4073ef46b3cf40812c28b40f15f85b2cc08. 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/FRX872121506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98505155381bfd686b43c50a1a94a3610b8b816b9a8af0b001d5ab35af9f944a. 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/FRX452123369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc968d64fbd2a260909115b0a610354a1bef67886d54d400b102e37bb04ba70d2. 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/FRX452123357.