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 0x623acb6aaa79aa2151d455d2bfcfd2224dec5d3b72120a6fee1ce618f21ad1db. 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/f5cb8cbf-f2d5-46f0-a98f-4905ad77370d.json and https://artists.proofprofile.net/proofs/artist/f5cb8cbf-f2d5-46f0-a98f-4905ad77370d.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 0xed1d4b79687d18b81caf088d17a52dfdc64676879131c53c807f45d7a9bc6722. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/ZAUM71300501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf25c5be3088c65d167be4a55aaeca4c6d9bdaf78df40ba2591dc7732fde3d5c0. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/ZAUM71300502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff0e1707d08364d4e4b61998c0150b513b575ca5f87c89ca2b36aa967967f118. 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/ZAUM71300520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ee832f72e7626987a63448824531067360ae5977bd01d226ca66eb9aa58a758. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ZAUM71300503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x083e45db0a601fc9f7263ff92ac31120229e07f66616df85293461cfaf70ed5e. 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/ZAUM71300504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994387952cc870af3a71e38711fa7b5c70eb0b9c4cd11dd19652e72d34c95c5f. 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/ZAUM71300513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5825f0eaaa50484f04714ee1690eb42c8f9d83fa573655c43faaf5a9b535ac. 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/ZAUM71300506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036fcca1312cac4c6032ab1346261470fb8f0f3045d3b1e218bb4892d4fe5760. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ZAUM71300515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a8251d015b5d3c2f2c6005985a292f111b58ad462d47974858ae00c86893dc. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ZAUM71300516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194d12b55e945a08db04542b290f5749356e1bd6f36cb1af02364b69c8d7ce61. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QMFMF1387449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42736ddaedd271d981c3b863b73ac4ea3042430b7831fe6a67a54a0a25d1625. 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/QMFMF1387450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb661f86070d6f87f0a722371d2e51b0f86daef37e11fa31da5b15240c6343965. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QMFMF1387451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c341a36e3c25aa99e40296f39373c0fed4a596ca94eeeaa21a94c1ba207a813. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMF1387453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c9dfad209bb4c34427077ad9b2c612af025e7d3bc3528e106c1d2e142f3811. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/QMFMF1387455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4805172dac4b6d67c64231276ddf79d41e43abbd26c76eaed987c6415b148a73. 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/ZAUM71700172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84faeded35a7fcf0073c01835c670c431bab58228f3b253fe1f343dc5c0f24ac. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/ZAUM71700173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be1161982910cea59bca85e2ad30856215d52d46b6d0d6a65e0a9dec5abdd31. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/ZAUM71700175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ae6203b003a91e43a0f5b7113ab7afad1822c3e70df056d461ccffe9c389bb. 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/ZAUM71700180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8f43113401972ab454ab7f2f805e6dee77f62674af1bdbfff449fb94a361cc. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/ZAUM71700182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28473b747cb102bb7c20e5f3a185d17b409a2b65b254a35cd7c71c55e7000da. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T12:33:53Z), 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/ZAUM71700189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa3d338f8ed808798b5e0fded1395b0a743be27a06b99e13b1ef3dec9966d1f6. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/ZAUM72000955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6b3ed1d2f8f06ff6bd606b2013dc5a8858a202f3eb9735887735ef587bb174. 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/ZAUM72000958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb73c1ce1cd737b63bf79a012dfa76a4ee53e4937e71ffd325cfb9e8f429383. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ZAUM72000960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993c50ec97e5cfafdeb07f75406f1a8f6af38152f7da66ac606d0dbfafbe5e2b. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ZAUM72000962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729e66a3db175167542a41b89fc1207c9ba07b1483ea7e96f13adca78bef2580. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NZPB12303497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e76ae3bf90f414c8be74ddf7036bd3d0b99c49fd0676317a0f4ebe42405cf3a. 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/NZPB12303499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d12856eefd5fe02538b0d9a6bc811b5a5d31489a985671da8bdb28f4de6448c. 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/NZPB12303504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a1e491fee27b98990ddcf7250bc76d639f22d521959d898f8f5c06cb96373f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NZPB12303505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e0bd5718b8f522c9478a938d9ae6db4d98ed79b4ee23aac78f3b4307ae3f2a. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/NZPB12303506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61cecdf056429f99d71f159fba452ec5ce6e44f699331c84fbd0713e48bca7c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/NZPB12303507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3005132b6a4650e7af825c6034240b99689aa4aab112f73e9022f74277b00448. 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/NZPB12303509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0400278e81ccdcda48b6ba64179c653200f99e02b8564a3680d493550923bc33. 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/NZPB12303510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589e25536e936ae24174b5af4be8ccb13ca15080c53a48d7bbcb16c26d118330. 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/ZAG9M1700001.