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 0xdf580144d90606a8dce86b95689cf08cadf12a1b918ac5786399d41a36533f59. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2e5527fb-531d-48ea-a5e5-bad43154d119.json and https://artists.proofprofile.net/proofs/artist/2e5527fb-531d-48ea-a5e5-bad43154d119.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 0x1c2a38d46446c885dcab8c02a24946c795912fa689ca8d478e8cb5cf10768d56. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/TCAIR2447687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fc6bb764be499e8d7c6cf1869002331b25dd2e9fddb02e882ad7a9fd0615e7. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/TCAIO2468198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2accfe68c15af4f36c734a0c88ab08afb5f7daea6d71e74e036dfa0ce38bdf08. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/TCAIP2479035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc08d2eb3a59c31ba5073be021b2540e932d1c9698166e5b8dcc35d07677bdf6b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAIP2458355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66ff9248417b3798f0ba0e8a47956e6698ffea6d0d3dd477bec124cdb908cc8. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAIP2458339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa405b3ae1d3e999a8607117e3cd5a90f9124271fca1f09eab30276f71927e4b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAIR2447606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3c8b6d7b8347760b52cd6cb56417bc9be510f1678016a34cf7b950d1b7dbf9e. 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/TCAIR2447652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c3f98b81ede31861d8dc4743b7b793b553d6539feba6ccdd02909e33ed981f. 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/TCAIQ2468235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0cd9a9524180af095f4ba656f5b53c6afc27960109c0df67be4c39247d5a9c. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/TCAIP2468216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827db4257257dd86b8c3e663d7cc43f91576c76569628920735b697586041ef. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIO2458314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e84544bbc2f43e03eeabe00d72072909cbb1393ff1c2ae7b58173168dab25a6. 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/TCAIS2447662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7022091da5cceb54e2fe66870d16e1a90e477d4f935ae1c55fe1ecd05a21e9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/TCAIR2447680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09a5303bc16d460609732391c68076828161d9b54a224c9c404085213e58b58. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAIO2468225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa630e0d4b6778a8e96685235172d6d613a4f4b928b7312f12558a46149d2e6cb. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/TCAIP2458326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f7a52cac34a0a806a74f5ecc923fc64a69827c6f28b0c1169534ad3a5c593c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIQ2426422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8ed23447d09a4b4cbd92dc7cd9d7b691dd9cc6be0321e149a31e597d3c6e8d. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAIP2489196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb785ba56bb82303cefe8955bf6b08d90347bffb41982cbbb8d338664447e5d77. 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/TCAIN2441276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ce4c78c0c86f4b0dc6dd5f402b4c9589f936178e820b8f3778bc1bcbb091caf. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCAIP2426490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ceb0ac8119c9f3b2ee93024cbc605a5598eaec9989b31ab56f3a723af6c686. 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/TCAIP2426457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93a2102c65ba9f0f37000e504252e15c80dc925ccaf8af4a6c3a43a916538380. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/TCAIQ2446827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0ff06bb76617043bdc71492bfb144d6044e1f70e972973aea178e927b04ad5. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAIO2479058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96838ee00a7ef58addef7667e663403ae5ed8d3c97db5261a965b370171faebd. 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/TCAIN2499651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21197a4d3cd1074c17f3123b26738b51ce2cdccba35fea99bf5a18cd9fde6bba. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAIO2479043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dacfa94c817419787164f57e78a20b7525f48c29bbf579bdc819a790546eaf. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/TCAIP2499622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77cbdcfef8f2183ef050c8d22195f0019a9285f77577b1e6c64101e1f2b14cb3. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/TCAIN2499612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2dbbb8cfd8d1c300c4ef7bcbb1d58b9c56f001af4b190e2f33f77f7d22f08a2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/TCAIN2499633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4639290fdbe548eb46ac9652996ddb29166372874f64d831b9fa446aa65652b2. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/TCAIN2499641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4a0d326101d0af082103ce06c62fdd926fc5d9067b5fdbf552fd35413b125f0. 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/TCAIP2489184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b717ec73ed9100910f86fac6c598997ed53ae0e3b0bb25fe348780a2b99073. 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/TCAIO2479072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be54cd51e1d7abddb42b5026853a36b1eeda12b2fd1d2e51beae2d5f17a4488. 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/TCAIP2499602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c99bfc18e889e9e4731d9e06d4af0cfc6de4e31e7b5d4aba1d69a218232b91. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCAIP2446760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725ad5c3d3d98214272e6d75c22ba9be217c627439e140c7b05aa02146489f97. 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/TCAIP2458349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db1631416ec62bdd1cc38fc59cbce707b068b1716e81b95c365b51402c87b0. 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/TCAIP2499586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac089abf6de9f5204618a0f9b5582e2f3a7a0658c0a66faba34bbbd5c12e3428. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/TCAJF2574561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ea31b91f559d20707f4c301fb05c26b40d791e0eb25f24db27ba389b40c4e9. 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/TCAJF2588665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4341d36a26d3debb87bb971a2a03f5149d08e5c2f51ff312e6d3f48f59b1ff7a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/TCAJF2574574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ed9031dcdc3ed5e773d27bd0e6734f449c13ab31f496cb2365fe09b535ee12. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAJF2588646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b85b21e32a8d7e8aaf43e9e064355aa1669a3fca45103e259895b11b7b9f35d. 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/TCAJF2587973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af5670e0e33abd8557deef9fcbc25fa0ee968e3015982bb6928c45ba54ba1b2. 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/TCAJF2588674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0e88bc84dc61ee65984294701a3658da5d31049b414f620b9a62922aea7797. 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/TCAIP2446779.