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 0xdd527207a1e44cf1ce7d5f39b1f40ff25666b0c3b353a861b8a480fa8048fb4b. 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/527044f9-4461-446f-8d5e-25279b23c81a.json and https://artists.proofprofile.net/proofs/artist/527044f9-4461-446f-8d5e-25279b23c81a.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 0x98c7dba5fd90c4fcf516ec40d61e0e487f22995b35fe38a59d9f262a98bb6f48. 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/MXUM70801084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5049f9c4fe40922b9863e1ce2ec9cc36cc3c210e77251f0b4ea206a1a9d23032. 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/MXUM72004313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd602ef7a97eebe7282ed3ea02cb82f25c59d78d9cc2e03b13383f696f1e723. 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/MXUM70801191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3a9c8c6a53c93ece1100323cc54fdd240541df9ab9835980697aa6cfc7755. 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/MXUM71100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42921d0c1868e02d70173b6d33c9fb474a21319a93cd256c35ddf62bbfbd8c6f. 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/MXUM70801186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae7bbd8f3bbe8a902c89b43ebc96e729b888117ef35f80b8c319d772b957d1. 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/USUM70987384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf338fc80ec5c686ce3d480bd51368f38de72fd8539f5e9162c42e2155eb9ad02. 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/MXUM70801178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2818094a0340ca5484880374349709ffb1a596ebfd7671d983fb0efff706f57f. 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/MXUM72004285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3564e0c13ab81371c8b01352af0fde9250e504636750d1315429371ee9d589c7. 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/MXUM70801085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2429c7f64db84e41a03cd803d5a77f6d3758565cdb22d82bd6ac1809c3ab6d08. 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/MXUM70801180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2563424252c4d14c66c8e13d4c053ee922bd353c8cb709ed7b628eb13c2bd7. 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/MXUM72004240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e13a82959d1fec5b9d252384ed189ea9b34dbc5f757e50c6a7da075795a983c. 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/MXUM70801182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eaaf4c2685bd13a5fdfe420536be4af83430458ac95d98c905921f67f981ac. 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/MXUM72004314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5434385ed38d933611b561c922bc5e8a39b2cbb6940463a04a652b69be6f4850. 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/MXUM70801189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7e26ab8613185b1c2abb0c96b4296db1179cce2202ef2ff08a5bb6d1e33f0e. 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/MXUM70801184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefae8f8dc3d52568d2d873cad735bb61873be390171e814651c766befc7340a1. 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/MXUM71100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3a9c8c6a53c93ece1100323cc54fdd240541df9ab9835980697aa6cfc7755. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXUM71100544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24bf44b815e60a8bedb2a685334738926c2069cde64d79c4380368960859636. 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/MXUM72004230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0116f836a5d69b5e1bdf10ac42d154ca39815652aa3ffb26b9e4b5c787dd416. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/MXUM72004233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2563424252c4d14c66c8e13d4c053ee922bd353c8cb709ed7b628eb13c2bd7. 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/MXUM72004240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67c41af8452a42d9329082c50e04a49cfa7c1246ea724f44c0032026c4e5c155. 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/MXUM72004242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753e63b2dea8abcefeb9c0cc18d01bc54cdcc7857616e9d2c84fea3e2db15f38. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/MXUM72004244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3548853f0de49bee3f7a635a54ee4bc68fa097ab9c0ab714b7d174226a1229db. 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/MXUM72004246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eb4a77dada5629a92ce5052a1ce9bcf529e8dde332310ef58e11f18603efdf3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/MXUM72004248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602956947127f72265011604e6d4615429e07e0eecc568653f1c44daa3c4eb38. 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/MXUM72004250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67976940828b73101730cceae270894e25b79fbdfde814274ea6733c0319a76e. 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/MXUM72004251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1452336465652c217fae7abcc33b476c7b0765fff273753c81881f63eac184d0. 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/MXUM72004252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814cbc970172e75e8b39458df97f5de0374370b24404ac30d34de18d7e961527. 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/MXUM72004253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fae7bbd8f3bbe8a902c89b43ebc96e729b888117ef35f80b8c319d772b957d1. 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/USUM70987384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2818094a0340ca5484880374349709ffb1a596ebfd7671d983fb0efff706f57f. 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/MXUM72004285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fb74e1ec9a0ec7b3f0745996a09045c0338c91f57180bd813547b9db4a7457. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/MXUM72004286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ab2ab5873173e4939219fba2fd7fd7832e5f3fa5e01be5abbb935121117f1f. 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/MXUM72004296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71fb4b6e69c9985a4f5d317f86c68358844f415a2ff1b6e53c644f53c0c4e53. 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/MXUM72004297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5049f9c4fe40922b9863e1ce2ec9cc36cc3c210e77251f0b4ea206a1a9d23032. 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/MXUM72004313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40eaaf4c2685bd13a5fdfe420536be4af83430458ac95d98c905921f67f981ac. 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/MXUM72004314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0f914f5df36963d20f8606d012a01b1df4969804cd45c9d4dee1479d432243. 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/MXUM72004315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c8ce95d34868af3444392aeb1b0b77abf506a952222ec8928185b764503e35f. 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/MXUM72004316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fa8b6815e5cae1504ac8cad91d335b02e4b47850bc2173825b880437e5260a. 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/MXUM72004317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3c7c44624cdb8fb1fee4887875b3428a4edb129b0dbf575f6e2c840bd2cd70. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/MXUM71602194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac58d0c3e7422776c466d0cb9b60af08ed50ead2a0434d300b5c18bccedd618. 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/MXUM72103483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53512e246a9821395c221cf95796168a558bdd16f94a0c699f327af1a88053fe. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/MXUM70801263.