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 0x4b1bf70660e2915029da90a3a9a221892aab313f7ee7b5b9af80786ca012bb76. 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/7a82b546-b3ce-4353-b128-333efba733e7.json and https://artists.proofprofile.net/proofs/artist/7a82b546-b3ce-4353-b128-333efba733e7.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 0x6302a3c4331ca455843e11cd6841bce197967d9d988ef3bbf0d95f6ceaf2e1c1. 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/GBSMU3353326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16a1700a4449c0dbf913b7b1eddf5bc1926a9e6846ce3fa300fccd0f8745fb1d. 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/GBSMU3353346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9574026b4870c96c963d92a3ac4568b06fed51788018e382f653ad9bd5817c79. 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/GBSMU3353390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb48ac3e362ea5bab0de98d11ba6a70fead17200db24d194c075df6610327a8. 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/GBSMU3353393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1280f88edf80f57ac8954f4f4e1220037f82d280753ad2bb84ce9d064c2c5a7. 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/GBSMU3353400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e90132fdac5233f46a7ee6ed0d8a51aaa12c93b2275d44ba9f1806ce98083ad. 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/GBSMU3353409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91939841507340acc321c50d71278428ec0ef3c22ccb8087966b924f825f2f5. 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/GBSMU3353419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56edca16a4757d80dfe49582a0a1a0f26125ef3a4c67b32dbfc7d98b90728359. 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/GBSMU3353427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a4bc90cf1d92826712fa466c4084c252002d33d667dc8760ec75a50c88d5cf. 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/GBSMU3353439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05a18f774991a1d97688ab5418f7963e08ef0e6ec8729d0496197cdff813fd27. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU3353463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41ec2a23e303c076fee3ef0e44db3968b34678a338f82fc3506756ebb8c7692f. 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/GBSMU3353473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f7efcf7cb72fc2afb5140931202cda557dcbc369c035040b40c0b691035a29. 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/GBSMU3353497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a9d5bdce279152561ba23793ea2f83b342208a71a8f0d5fce87790085ef161. 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/GBSMU5168591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2623e9020dcb9c88f58735f6103c03ec90a7ddd4a1e7bd1343f43e8b68bfaf99. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZDA71925016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c654c3a4c5d3432b0c38fdc553bab432fc38a6d74af45540ec57a7adda46546. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZDA71925033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2115d23c27b82fea71a95cbd90a5dcc7f7a77e15c3b8d5bea3713f0399e04b. 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/QZDA71924121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22335c38f797b4970552c332c0aea7b938411b67321ade42879f6c1b5221288e. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZFYZ1906750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822feb573c4b29a2308748d3f46efcb3eba9b39607d610edbe805874842f68ad. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZES72034165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5989cb0449caa8bf22e9bcdf321cb1fa5e9ce66fe245dc10d9f21fe4466bb8f. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES72034172.