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 0x86ae3731bd1f46d2a041d70227fe4d4f8b8edd50d16c5c7e71366aab2f14bee2. 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/32898015-394d-4379-b677-83057b0a5a45.json and https://artists.proofprofile.net/proofs/artist/32898015-394d-4379-b677-83057b0a5a45.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 0x6ea78f2b800ae74b3d36461de5b16a5c397214949db3f076fce8ee6bfd86a9aa. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPE2504628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd966dcbbd572d2b92c09f7a8368926f7eee8ef567f56306c3dda3041b8932542. 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/TCJPI1817253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dba56d48a72fdb1c6d28cd66e067a262be4b777f0110b9ab2fd5d2077a22945. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:54:56Z), 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/TCJPI1817244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7980c1008496c0436791965c9e981b2b5a939d49b6defa3e498638f0ce2b584d. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCJPE2504674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1419bb27e2ee6f10c12aaadf214d6096cf1afa4d120a3201cc21ebb3603c9e4. 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/TCJPI1817247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05e27d82a80666ec9b3eb44cb3eb6be622c8fb0ccb3b4546e3745a750aa78b1. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:27:53Z), 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/TCJPI1817248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8ad3b68db35086ecaf8c1773776c87c62facff2328518bc3064c1bc7b48488. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPI1817255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa090133a50ec67b90db37894d4639f62ecf0882d5ad958f4b8727e231e94c119. 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/TCJPK1921003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda44d83c5491dd4806ae2127b3033977e29c103f114bb7cbc5b49934360b711. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:28:28Z), 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/TCJPQ2295655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29e9fd31365b4665550bb7c034fae856cd852561406eee5b78f5b7d65f6ea7b. 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/TCJPQ2295658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd8d037acb4f5628d5753648efd4476ae5aa40d69f32a633674677b74db1a98. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCJPW2373376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4edbad22dd04a757e64ec0aa50ca3fe46eba3650ca6cd2aeedd157347c034d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCJPW2373387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4933a08a791aff84c95df5f433de664691a07f49750453e471a804d02bb5412b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/TCJPD2594046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62092e01ce57b9e5c1737f23d6aa4825efa4495ed93c3cb16635c970306950a7. 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/TCJPD2594062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c16accfb50d6f50a2fa62b597495c79370f5f6aa2ee102fea5acca8aff5f83. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCJPJ2517349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a8a9e7a170d7a1831961cf314e356fe7a3d487c053464b0dc3a7c7c0d69b8e7. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:09:44Z), 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/TCJPK2546697.