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 0x351d649ca5f299903c334bbb18bf384a708bdb6f65b6300d23d50042f50c9a03. 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/8929e8d2-e1cc-4de9-877b-b57e25d10afc.json and https://artists.proofprofile.net/proofs/artist/8929e8d2-e1cc-4de9-877b-b57e25d10afc.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 0x70cc30cc31bdda74a0b57e6170bef42a9c3cfadfa075a5f878bbcdd44a1ef25a. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:44:04Z), 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/FRP7S1700110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cc110824f9274df109267e1dac3f4c0955acebff616d5a893671e8c0e20887. 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/FRP7S1700120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7474c26319ca0a859e4847af7ed4f1d7423b9ac95b6798a35c7a00a54750e64f. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:09:40Z), 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/FRP7S1700010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc1f17efe69cf1689b5983a81c4912676a8fee0005a08c9a6a8f144052b9725b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/FRP7S1700130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4d9100c93f9feca7cc5a5522133cfc8d277deba16cc127c435b602090a2b48. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:25:36Z), 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/FRP7S1700140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77c92489619a003eb3dbbc2ce051b219d9e7abaa57f8d3bc236939e3dc02149. 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/FRP7S1900110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b1d4161acf75d0434aa6625abe3eb6ff22379262ff9c987d18f6366400fdba. 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/FRP7S1900070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb79070833304929b439bc8bc2d728b20721a023c13481875ed5c8943e01751. 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/FRP7S1900140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37e8d4c2a4e6cb8b4723540888cda9f0886757a329913faeb579b7d91c8fcb7. 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/FRP7S1900090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98c61f2cbac6a069add216b3d6fbc8375cab1b97ce21b7fbe6e9646aeedb124. 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/FRP7S1900160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6568464de442fbe17a07af2656a717d6fbcb8f0d9037cd00d6f07eb0563ec43. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRP7S1900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667217e5a86ec60149440f843791d5293a14b6c99d519b59c9d017ab326e1c5c. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/FRP7S1900120.
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 0x3cf1d04a143805e7aca094b5977a5e6dd5ab07d588e2196a695eb1ef0cd56680. 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/FRP7S1900150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28725cde4bad92e0bbf96053bb197e4642837eef04db00f0e751eefa9ccef308. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FRP7S1900170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6b4e0dca210557e60e9dc92caab1e1db2f7a829f2b1b5e849dc6cd8c71d84f. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/FRP7S1900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e49b851ab343a6e6f1df5bd825021165e503cd01bc5249d827e1f9302ab95eb. 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/FRP7S1900200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b8a7d98405522ab3fbca5b605378984cc1964b661365b0f4ec0abb6b69870a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/FRP7S1900210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5efe5037d2cfd8772412e08c11615d76c3294a78b469a7b0deac7103558bb649. 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/FRP7S2100460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c1d766c5890a291ee53e0b39a532a002b3bcba88062f406f14c2e24f85031. 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/QMBZ91982695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x204c1d766c5890a291ee53e0b39a532a002b3bcba88062f406f14c2e24f85031. 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/QMBZ91982695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3d43af70cfaa89cdc1c39b217f0023bc598ed3363034d49b8231e65fb83e264. 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/FRP7S1900520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc5ca781afb30b71277acbcf7ab8d50372c64aca60c52563fea79bbfb912dea9. 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/FRP7S1900530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0b9db9f16c964ecbbbb04de8db1662bc3f7ec03a03ca8d7d4b8db077466e73. 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/FRP7S1900540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395a52d32f4e93a0d6cae61094362ee06741b781bc0c4c51db910f95596dd278. 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/FRP7S1900550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x233e1645cdad880d259a765e7a8fb27991014dcec9616843648a0f799cd9e6e6. 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/FRP7S1900560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf8440edddc48f8546a8f4efa2c6bb0e171c9a16957caf2fefca49444d2bdfdf. 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/FRP7S1900570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf44f5b171d8c94f338b1ee6d0b04784b80eb851ac98d3cde4e40b2f2e7d4aed9. 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/FRP7S1900580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895637a2be2cbeb8cd50f6dc7b097b353e44b566ee791a22dcadcaed8e5c1b17. 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/FRP7S1900590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd49299120c364826ba6a4f0b8c1cd8425512f2e7004f99ff41b3ff46574117a. 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/FRP7S1900600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x009793fa385bff862eec1b2381be8151d8d200ede49db074fb9791cac7a469c9. 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/FRP7S1900610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01464771487af0d6e236f8790640c0f4fbf92245b788b24c56f0c41d12e77ca. 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/FRP7S1900620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c2dc79c77f177455fa61101e3d4009236d0b43c8010af8d11c28c561f238fa0. 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/FRP7S1900630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063bdf3882500456f9aaffaa15a55241d3b6b7d6096fe0c4c84defe7c6f7d13f. 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/FRP7S1900640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe102c461b983bd79f2fd78d58fc6535d9d14b725656ebf0d275f2f1b2a26846c. 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/FRP7S1900650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeadfd0be96059f72f3eb56d9df22678f13e38d7af88a821e3afef5db91a02710. 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/FRP7S1900660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a6084e0251093ac21cfbb265d9ad8d7a06236a9a0039a0a4d65b4991adc8d0. 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/FRP7S1800050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07f8764fec903211d34aeaec164a73b17c7c250c40fe52f15093a392d8373e6c. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRP7S1800160.