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 0xa0fee2b655bb07f7ac3569634a2fdcd28204f4a13ae0f3773d6b02093452cbf4. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ec7bc461-cd83-489a-853c-65c2f1065d55.json and https://artists.proofprofile.net/proofs/artist/ec7bc461-cd83-489a-853c-65c2f1065d55.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 0x5b81638cb5dae2c3b2857df5979ae6ae8d4ed26f23787217f67770ae0f1da1f6. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL0B62370627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47afec9c5a411c33bef8d2f8c4ae14b8ee99743bc2b689d00d66b5fc1d29abf8. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PL0B62370632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6baeeffca51b492c26c63c6f57bd38904ae515ed26cee0a266fb36a178fbf0. 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/PL0B62370665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729dd6aaf24ea7d35b8373a2dd643eb04ec634486b3da061005e2daa9a87909d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/PL0B62370666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d06294cc8f9ea33afdf55a7563734a7f4b46355f6f7db536974a96e2151ad7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL0B62370667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20463c1582d5d72cd0525ba85f54e4e23b72df0fdd9e562f29e3d936305591d. 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/PL0B62370669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b3bb13f7df5cf65b5a3c458992a486d42c0c1c343f8c187f04b72d9573b122. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL0B62370670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e6093f0dde057c7951d681ce46a92ce4cab26121237bc1de3241cbba82ca89. 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/PL0B62370671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db11eb4d4a5d32fec63dc03a15051f72683425414cf08d2e1442d51844d9822. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL0B62370672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf32ee32b218d28b5a55194bb23517e3a528d318f789f5538144d65c95d8688. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/PL0B62370673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd6cd3c1cd10e3df098ece96c052b228b7925ac1034d3e80f35b438ca52c186. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/PL0B62370674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71d2a069a1472a6788a0628df3e963411bc5ef6804ed3ed4d8547c08a1dfdb79. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/PL0B62370625.
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 0x040ff1890ce53e1763c81453940ef7adb411ed7bfd7d584cf5babaf8828b8451. 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/PL0B62370626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x720a8322afd6a33388635bef3166ee976225d85133dfd63569a59b3ccead2dce. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL0B62370628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75aaae2f22766a0c7dc4fe842d32dba738e305ee2811c65380360c5d06602122. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL0B62370629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7913bbf49d6265413f5f774dff154aa826b871b023479bb21175d33bbae3590d. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/PL0B62370630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02103f785537f3d5b9aa87c0195dc016f898009a014571f7407775ba92e1d73c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/PL0B62370631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338dacf50e061457041daca9eed333afc0607e5df3548f66e1c70c0c79261541. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PL0B62370633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23eb270f252dca27936fdc43e8cb160d1904e416fbab565aa3489b999b91e22. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/PL0B62370634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23b08346c65a4d111d0863cdcf2909934edc3ca61f6b8929b78d796fe656ae7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/PL0B62370668.