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 0xf76cdb5cbcee77dda9595f1f1c560026597fd640e2d30b4baf3bf12abfa6d757. 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/b33ec97c-9f92-4e67-8e81-8314b86fb4b5.json and https://artists.proofprofile.net/proofs/artist/b33ec97c-9f92-4e67-8e81-8314b86fb4b5.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 0xa6e8f96a3a0b911e326f7f18c531b59e53e2e71109a11de192dc8d691868fc72. 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/USLZJ1572140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102815b119892b500d0bb52678bc90df2ae71606bb2612a5170c63b23843425. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5FN2288777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf4205d8e117b1120fefae15b18b9686e18c5eda0b6433db4995850d330da15. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QM3DF2404127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9da7d0428b6e1b0b98c8ceba79d9d3450e81df9d205c7b27bbd92cd348da41. 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/CA5KR2425677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6795edc90870ea15e7b8c5329ad8ca506554105fca1246cce3b016230cdc2056. 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/CA5KR2425678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd100ac89e75ca394fd97a265a00b4e3c31cb4386dfdc5d05163d36ab21462098. 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/CA5KR2425679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e51d93aa3e8e59ac64a0ed1bdcadee0a848a80287ff6f29f029b0d7211cf48d. 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/CA5KR2425680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e9e1382b4489bf88dff5b42a5352be2d875510e65de97cb0eaaa070c893b4d. 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/CA5KR2425681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d14757e2d2a7ee9eab9e660873e1b90acf2ce648af2a5dd8bb32eac0502bbab. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZWV32448466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23e00a13f99d0fffc00476bd9ce8e5cbb3c45d233bf466d56a15b3354441869f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZWV32451514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31854d637d7f29b77771daaf458f047ac9fbad0acd9549507baeb253be46b6d4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWV32451516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2dc996a2d29f72b2bab027028160b2f6a22a1b4bfb9f6a73093ad1dff4c547. 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/CA5KR2402632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd96751369944af66d4c64c6b7258a3e85f2c4b434cbe019ce19bf27636704. 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/CA5KR2437475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c5a010cbd8bc9de05a26b122160880252d62a8946cd4d62514a1d2fbe4ea138. 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/USLZJ2367376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791631b430225d8f200e6dc5dcbf95c1d968c7a7a0bafb59c46be6e039d5de33. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GB7YL1691617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd96751369944af66d4c64c6b7258a3e85f2c4b434cbe019ce19bf27636704. 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/CA5KR2437475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb201b954aefe28f272b751faaa4bd631ac7987f28d8dec04585aab0ba32f816e. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CA5KR2425713.
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 0xe3b098cb9a524f257e846fce35c8bf4ce9c31b5a8ab4432971bdbda8c7eb31e5. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/CA5KR2296918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c4f0da1545529052162215e9f781e4b88076018509dd16832b2af14b3bb1c31. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZHCR2000082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b5073bb131b631c3e14471c6ce138c143f4a7a947130e514b1b20c9dddb6cb. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS1Z1641801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe7c88798eb87dd712ef01d3e06d45208e5649b3e66e6989e404a8d7b068753. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QM24S1802266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe686de79cbceaf1be13c134436cc78bf06e547878af5ed15ec8857dfbbf4b927. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBRKQ2198545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa365986b9105d99e42a6754f8b1008d4789a82735ca0db5538efb111dec7bc76. 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/GBRKQ2199961.