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 0x981bab719842056164c85e4e9a9eaa466d9ac83b0890733e45a466948045aa94. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6d06ec25-4210-45cf-92af-1e4c1d35c264.json and https://artists.proofprofile.net/proofs/artist/6d06ec25-4210-45cf-92af-1e4c1d35c264.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Prosper (Minor Forms Remix) / South Loop Era
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 0xd9998661f0a9ac114a62afa75f0537edb80f360d16963f4689effe1e7eb30b96. 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/CA5KR2351257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663ff30a9a0c034efcb07dff10e23d5835a2811e95f1d49a035f6c45f485b7d9. 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/CA5KR2351258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9418b899aa4e216e175e627a6df02d334f0ee0ad5d5cf20075a56cea1267682. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GB8KE2203933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9e8acab54fc48af1e34d04cd3c7bd7f7d68383e3a28a3d5964f6e52088f7bc. 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/QMEZE2155276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06333cddb5b25be1555ffc69d01679565e9528051752b3afe3399b4803de4ac. 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/QMEZE2155277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8c2d1b4922d0222c7aabcc956e8148559038e96424618ae760dd77f78e0bb7. 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/QMEZE2155278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b724e5f6568e69455c2edf956c4cb1ad70c77e5804c16109fa55f78e5fe9c7b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QMEZE2155279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee79164ad59de692439f87e66aec7d42b45714905507f0813c665d9abcd4531. 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/CA5KR2070991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb710d2ecc13571ebbf34739d230d6b5eae41d05b384049448f508785e73ee51. 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/CA5KR2070992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6252b790d235d00005c81f860f947be37eac98fff6058680dd0e4f07727f1fa0. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/GB8KE2050813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85146002ba34307e12b1f6a95a0228cc9f4e38ee75bd7204d023e4daeff90a7f. 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/GB8KE2050814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47db0d36af50d787d2519500730eb11b3634ce87948e6edc4989f3db8657ab5d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/GB8KE2050815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0770578dacfde8f4b85c5d559398a3f3bc8bce9003d9572fe1bca4c9a38c2dfb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBSV22000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aa57f7b45b28835c54a73077a05e9be70fba5d8c9a6df27a6ff7a0cdb65c1e1. 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/GBSV22000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f3f7197e9123a8d51d5caaaaa9205d025e9ebf2dbb785b7b419f9271df2ffd0. 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/QM6P41826383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e98c1f985433c32257dbae7d0007c13f681514868bea8b755def40c3fdbd4c9. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QM6P41826384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b1ff50291deff07a4be74b85857c3f2a858551e8d35bceadd69dedad00417b0. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/GBSV21300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacd9806c3956d30f9860d6995bb09d0facbabbeb4f0c16bf6db0999c89161b5c. 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/GBSV21300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b13d535c8bcb1b3b0c9efc6b4e95bd14fd72bf36b31a82bb7c0922646eafa7. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/GBSV21300032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d544cc923c86c43e8e485988c18b1cad4dd73b835b5b2a8971fb43e3b91de4. 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/GBSV21300029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f14a1f281b4e5aa0ed50e6d0237b02b3e1552d8a67c068e4d07d939996da91. 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/GB8KE1757696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf086a117fee51ed5157d873469c1ba4cd62a58419f1756713398f7c2911f032b. 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/GBSV21300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea2b532998c1b6a17db92c640afb9878bed402b7ddfbc973bb9cb7d48751a664. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/GBSV21300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d0b69b338b1a9eda3644ae337c8796e573ad837a5d5f45fd3d5362ffa3407a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBCFB1407004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe389f13a0e0a875588df5ffb3d3fbdbeb464c891fc9999ae208d6c788e7f30ec. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/GBSV21300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38030341db677f843c030bf7df3f627ad6808b28d7f8e4090e01bb208ecb22c7. 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/GBSV21300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4f393e8525d85172e721283079edb6ac72aae5bce0d30815665c92c42effc. 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/GBSV21300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c3028a7148dcf009fba82b9d77333589b427fd23d4e350cb2e0a0fd8bdff25. 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/GBTHS0900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ecd3f1f2ffa508934ff59a20a281bff06eea89b823045c985dd55854b7f0c64. 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/GBXUN1000002.