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 0xc2d77d0709d0de5aee3c7dd667e8c57ed76476a74174da37f61c76fe55436194. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abdb5a27-3833-4c1e-8119-56b7aead44b0.json and https://artists.proofprofile.net/proofs/artist/abdb5a27-3833-4c1e-8119-56b7aead44b0.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 0x7fc13d17405016451a250026658d8f4ef270a0582ff318b1891d59878dcd1511. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/CA5KR1512672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91db721abaa055a108f45c59d52da8402714614a10e815f83ca86b8f1352a6d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/CA5KR1536078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d1c129baa473193b7fe9de0cb44a43db46fd883a6eba942d354991d676ed18e. 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/CA5KR1532091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8167f95dd1f57522ce55c1fd6b637fa76afe4314122ec93eb298e398dc48e1a9. 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/CA5KR1551012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8124ad1a1ba5642057d4c608249098f6ddf3415f0d290b615bfaae5aad499cf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1574451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a8ca7b204cf6731ecdf713cd16ebf4ab689a0a4aa4671d466e2a122f2d6814. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR1569094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b9e70d1b24232c70cca6f0bfa839938e3befb24d82f74431727ac09eb6555b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/CA5KR1512325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb020f6600518fb395ae88ceecbf086f776b730e02b497ecd81cbaa15defbfd62. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/CA5KR1512673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553bd24a279ad34c42e36a7b37bb795c1c9b9351a41183508fe6bdfb3db5f232. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1512678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51001adffc115b253192a0ed51e65f8f93edcb79649afece45831488d1d228f5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CA5KR1512326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49dcd7c0a0a073114b0255a8a7817d187dee390bcdc13ff7510aebe42086bc1f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CA5KR1540668.
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 0x185c1e59a499d6cbd8693e21b80871b1a2f2db510bbe106ca7d6291ef1cef997. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/CA5KR1536581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26408d3163fd2234c080af8593c0a1af6303cef1f8883d26bb3cc040a0a04ada. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/CA5KR1807487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c32004a8b785f0c7683e7e398a53dc682034c6514aaddb6479e4b848ebcb9ac. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:34:36Z), 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/CA5KR1711643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3746ec9f7dbb470b55666e2f5c0ed888e8f750842dbb5ea1486fae3292d3176. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:53:48Z), 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/CA5KR1800946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6ed9a1fb57dd07a040ccad9cac7dd992d6d60ce157116f31ef88c3691d329b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CA5KR1803680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9af76d26ca51482f06ee2a03bcef06edae2549fecda581a1ff5bfff5e9fe7. 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/CA5KR1715600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe868a251d408665e7e6af561e5d2aab10094f79bf0cd1bacdc5f7b902e885c5e. 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/CA5KR1824645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c25f9c898ff4fc06312970fc00cf304727891e1cde3b5c7571ed79336f33a3. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZK6Q2148905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x581c6105896b7022a1a0bd5f5995c467e8b16d818a533d6b9a6a33ec7f085993. 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/CA5KR1902818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe14a72e8561605899dcb0ec703c1e2be1810924c7c021a0deaa9009a658a7b6. 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/QZHNC2071719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c217ee435667271d9f0a64a83547ce91a02a29420dc972927fff0d251e16d8. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES81904384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e742a23adde3fbbf04603c4f4cfa07889c8184b02277afd581297cd1cf51dd. 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/GBKPL2208239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fc792cfb32f52889027dad5f09c131c52d7e647e7ca0808212e332485fb16b3. 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/GBKQU1504781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f675b813cc8bd0502ee4ec0cf451296dc0d9dfa4a0c5a3d47b13f169aa4cd8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBKQU1504780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7bb89751b02d2b8a122a7e4b79a3ae487a4fc481b5bc7d8406890d8b055989. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GBKQU1504784.