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 0xc436803acab712aa44428f49ec031a54aec4075ba742eda62e23ff7406c07180. 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/df5a5410-d6b0-4b58-a3cb-b889445e49b8.json and https://artists.proofprofile.net/proofs/artist/df5a5410-d6b0-4b58-a3cb-b889445e49b8.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 0x8fa661d102786267dbca56dc3e79a80e5996a6658659f6ba3385afe5cb579d39. 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/US5262023640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa661d102786267dbca56dc3e79a80e5996a6658659f6ba3385afe5cb579d39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US5262023640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x833204ba530ee04fc63e8c67eb9591928619830998695e72635c9b1f2102f482. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/US5262023764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d052f6401bdb7c3995654a1b96c9b9eb5381225f5592d3e02aa24ddfaa76165. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/US5262023765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8824908d153d6173c17918b7e02cdab0436e58352a29d6289fa4acc83da1ba2. 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/US5262224825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c8712ca74869df6d92a67af8c899b869ef89b73f792aeb0d62222bcd820faf. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/US5262325438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef47049fb0a7704dc021a526911f18dfdc14eddf391db98fa52cb7c255bbc20. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/US5262325432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e6cf66e10fe57928b11c04acaf6a130b65a8ca57181be145da1f48f721070b. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US5262325433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c8712ca74869df6d92a67af8c899b869ef89b73f792aeb0d62222bcd820faf. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/US5262325438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d1b7c3fc05a766b33c4f3b19ed219eef44062d908b1688c783b4c5dc52fd73. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/US5262325435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6577b7eda6e99b28d3061a686570981a11460fc2693bb4b51de3c1dc29a14d6c. 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/US5262325437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4688230eaa2e85e66904bd4b6386a25390b0115f702cd587bdef2f4a37775d. 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/US5262225007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444d071493926b4180ebd51c81a330b79cc9e37130984e4758bbc5b2c4287c6. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/US5262325439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5dc48e730095b867ae7a1ccf9e464637539ad8bc9ba7ca78698119ca7de346. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/US5262325440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e1ae749e10ef31750bd5b736252e431644cf012205133edfb335ac934343a3. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWT2479637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80689e28060e0ad01e60dcefaf436e1b9f2a1c9e312b65530868e15dc0b6bbd9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZVEM2527370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad8b1d618e046d39f78c84101632e533682a4bf634f7651ae44ac23ac7d6e0. 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/QZVEM2593179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6981a80d2b23aabe23a923a5726395064bb040e435a30000ff7e9413145e5054. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/CA5KR2586936.
bittersweet teeth - bixby and NOT A TOY version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd013d59027a7efd6d6c5066da4a0cdcaccdcddb00aee18c74f681d7e24ebb9ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USEP42304003.