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 0xa4bcb162f47b90b455c37d14a5b8cab15861069e907acf78926ebb64dc1cfe45. 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/8812b071-f9c6-4e58-9b12-2fc5f6d48f03.json and https://artists.proofprofile.net/proofs/artist/8812b071-f9c6-4e58-9b12-2fc5f6d48f03.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 0x2a4b84ea1c17d67763cabc1997894ba763f6953fa3d3a3bd2a25818859b815ef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US7VG1618878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae87ebe77e413264c0c2c299d2cc8efe26470eb9e7b5979eefa56b5b79c32f28. 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/US7VG1618879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50a243d22b5cf34ff1ece8fec07871f031279056fa14cfb86eaca50e8ce4418. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/US7VG1618882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde570d686ab8c68e7bfc03a46149ffafdb29937cf155300581ca60f45fef450. 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/US7VG1618883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3297b6f4cb60fc1f6901288db7e60ea5018db04d9b718b08c79922275edd53c4. 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/US7VG1618884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29cbfe926e3cd6b6eb59bbcec51d19ceb92a17ff477d379e1ee75500fb298f5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/US7VG1618885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8031f929edb47402cdff38f22741bc5fd82f16c9b629630b571d43c08165f5bf. 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/US7VG1728193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631dde153e4325694ca41a71541fc0a660f1516b6f57f93ab9809b850231fbd3. 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/US7VG1728194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b7b06f298d6741a52c8ef651142b6018e2aa4b87fa939770926155aeb33770. 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/US7VG1728195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814ab349af3a93bd8e52006bce1f9ee3d1f6406d289e8572c586e1d6a9bb7da7. 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/US7VG1728196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf424705fb15c8adb59f5aebcdf49bc791e9c12f33df06897273f0a4f40307f5d. 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/US7VG1728197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3d4ac9acd49709cc02a05f474f39acaa7577d85114d82e8cee3d8b0cdd3d54. 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/US7VG1728198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfdb7b7926df9e76f3dcd775aa5fd81da82362ed15937c431ab8f9a73835216a. 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/US7VG1728199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650aa05e7144f09618593b167d2cfc30167ed1fb9b2ef5787a006e1c9f28a03. 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/US7VG1728200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe823a594be4330911214b52c922daa33b95e7564beea9b83df40ec787b0ebe50. 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/US7VG1728201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5810e3156b4ee2f129c52e47cb61b750fd25295dda10d98f4b247098c9f93e. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/US7VG1728202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504c33b2cabc62ac05a6b5b3bcbeb875b1a2e34790e8465fcf11186e43ed93ff. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:24:38Z), 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/QZ5AB1706259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff31843e574d710578d82972e88ae950d94057200a3104dcd0a3b8ce6f776cfc. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZ5AB1706265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfeab22e108fe4194909e304b6930133706a627f1cc5096dcc53424ee22ce9b. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZ5AB1706268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bfd3c2b6bcb48dc57c3650c763d9021eeb90c99c0277353f3132bcae7ba1693. 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/QZ5AB1908199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d2254d5decea18b504419245299f4111ee6fcf4d160729550810588f55c099. 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/QZ5AB1971759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe302a51c91b5702cff0a3b8189488fe4c6ee9a9605b83ba5fe0bbfc89e0b016. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZ5AB2029469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5c60eb7b33db1b62528cd0529675cae4aff0acf5b5a34fa8c91f76efa3da28. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZGLS1981802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5776e16b2d1a4119beff9ae89650b76ae6c3e8ee15f79919d710b7420ad20eba. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZHZ41928360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393802585570cf49cf942ec527e397c2ff757ee9b19de7e8d9914e27c7128d8d. 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/QZHZ41928362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e829a6c7b8bf3aee94c3e4b558bea66f20ad34bf8f7d35462b4c4a6ada28c6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T13:53:10Z), 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/QZGLM2010247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ca823b1bb732d0021919cc4ae95b8c3a4a6e0315af63a3da5b435067238dce. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZNJV2032854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde667d54a20369a7676b4746f00a6a80f0ffd7e15d45c9fd009daa996e6b3219. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/BXO4Y2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1a0f4e17e57426d2ebf3436d05726ecd44b7ef45185de000238dc82bd6aaa9f. 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/BXO4Y2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22cba0c6b2abc943504dadb42af4960066fe71a2057dda947896004ffc64ecf. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/BXO4Y2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8cc79d19de51d9ede0b3dc0f2f79d6575df17c80b205f35e4f32c410fb1a1a. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:49:31Z), 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/BXO4Y2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975a2f4a294ee5bc29e43429464f6fc8f7e7291367d89036ebb6340960cc57d. 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/BXO4Y2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa250cbf9a9bf9bce67748a4f76d01640d2d18309f398eedf3cb5c38712c289a8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/BXO4Y2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc277751a3da8f0c7bfe4bfb15b5d9a06ac183d26ce2ab3ec7469fdef7873ffc. 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/BXO4Y2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dcebe32128cff6275eef40acf02c7ebf73edddf294bf9d9fdba69b61d90f8a. 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/BXO4Y2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334de82229575bd9992b13e915f87c0703c859cfd42a131b56eacc1c674fcbc4. 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/BRCQE1800022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc245c46e4288ac966a9bd49557b5cbc1190183b475a327db111bc977045b20. 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/US7VG1740637.