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 0x30ee21bb332617656b68a096e831e852f5c75806d72ccb4cc138beb434773d8b. 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/6d26defc-3c7c-4444-bd5e-23b31384d421.json and https://artists.proofprofile.net/proofs/artist/6d26defc-3c7c-4444-bd5e-23b31384d421.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 0xc1faaaea04a9f1b855ae44e1496042663efdf9c3bd09249ce08f1df6b2646b45. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAHK2346225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5ff2d31c1b8d0c0a9f18c6dc294b23a2cb3102223162a92be1cc02c9175f78. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/TCAHK2346233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d983cc7b90fbd132dbb12f484328205ced996de6062a771af30079fc5ecbdb. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/TCAHK2346246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b472825e4d3d309ea125bd6f494b903dd7539190cacbaa3d1b1a6d7f9e5926d. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T13:04:09Z), 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/TCAHK2346249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5c90034407e71b8b477801b1a955d23b0db3e3f27b53d7d4e244234431a4d9. 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/TCAHK2346261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b7e18cad198f90f74fd61eaece5e249c2bdc33077893630d1fea2e6bde2e83. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/TCAHK2346270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04051d2ec11270158d975c0cd0ec9317553687836432a3ee5c961b3cc643b8f9. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCAHK2346277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d715266361dc00d9ab6d9dcce4407e71aa97bbec3f3736b6d42cb14dda9d7d4. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAHK2346289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56c0fac8e65d59cb85733da31b8aa163d9a98566192439a5fc1332f392c28f5. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAHK2346295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348963e392a4bc051ad105d02091b756aa9fc6720c840508f6f5fa99c9f9a8d3. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/TCAHK2346427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3496fa0132338eaf757d1ca232557ccb60c0ce9cf51f0d8b6a030ed2039aea. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/TCAHK2375347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2b48984b4f9f0db2600a11882cfcfce450366d9a0c0cade38457eea34b6f1f. 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/TCAHK2375351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb211bf26f66ebacae2c8372762a772f592dfcb870cd52d2e4213e2db5d4437a4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHK2375366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f102554df7b4179eb8bce1240eaebc4004acc9721957d496e5a7e9afdae09c. 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/TCAHK2375408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb35067dc2795968d9b4fe5dd662d954c7a1a86af7e405cee3d1214b850cebdfe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAHK2375418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa899e8114614358939d67dac2bbe4b7efe6a2a0b4e7eaedacf0aa7e8b7a325. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAHK2375436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aad2489fbce0623b8e4570b61e5a4dc472c9c0df77e88f9de267f17218f95c3. 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/TCAHK2375439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa921a706ae9c04f5460062869054f42c78454045f18bff24733ba9dd639aefb. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/TCAHK2375443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c7d01eec1c762395301c696c8401ee7050328f0b07181e6570f1d90a38c599. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/TCAHK2375457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e723c76bfb23eddc3b9109dd67825124404ca0d504e0bc4a991523d66647cf5. 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/TCAHK2375465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf839b8817291b17d76893bb8becc4664bf2dbd899ebb8bbd3bdc86f224f0ff6e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/TCAHK2375477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009f8a0c340331395332a5e6466fcbf98c714f45888758366c75ed4f1a24e499. 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/TCAHK2375492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22cae77a689cc8fb97e79c06c2a59f3802e88f9540d0080e4ab2cf0dd144831. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GBMJG2406829.