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 0x47713d529793cc7ae610176d39c1e8bcae1d6b36eccf3a5e535fd316bf2d8b41. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d513f9b0-8398-4c57-aa6e-bd20213fda86.json and https://artists.proofprofile.net/proofs/artist/d513f9b0-8398-4c57-aa6e-bd20213fda86.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 0x84ddccb8a4e4471496f7d7d5ebdbd867e2e2d5380834366ef92ee57d5b509929. 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/DEB630490524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a699dcd1a5dbb309d421378965fa9908f4f629cc978749700a202cfee104a4e. 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/DEB630490528.
Dramatic Workshop, Vol. 14: Love and Emotions
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7aa9d104afa1b11bd034dcb858954dda170c08c573ad7aabfedadf32fd595. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DEB639707724.
Merry Christmas (Frohe Weihnachten - Joyeux Noël)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9a4ba236ff3f1b77b151a9690ea2d3651547524bd544fc452d2f0629d0ee56d. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/DEB638910504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8f6adc3bab413e4fb962ea20284642e81b7f0e844a5e1d937c3fffd7594e5. 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/DEB638910509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686f6c8bd58e23ee49637843caf417898196179ff04438cf29578883adc76397. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/DEB630001503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee03396e569b272ea62755149d355d0e5ff8a7960fe14920745e891653e8241. 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/DEB631676322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0122e0db25227424903e5c5d2dbb72798ec7ccd73bb4ec4fbc4f09f33e022. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEB630900605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf049cdbd7cff22e17f5311a8ff4074d52fdbeb0dec607706c5651ecf684c7121. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/DEB630900319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a0116cbe6d290f1c1a1703eff6c5f2e6dffba0d94b5209babc0f57d8adafc7. 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/DEB630874524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac25d4c5e5c821d9baa957a9b5da888b261e74e38b018e42bf6936b023aedc8. 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/DEB630502304.
Dramatic Workshop, Vol. 17: Action & Adventure
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4980ee3dc98097558bb70aa54e578ca0210002ee864176a01ae489cc3378059. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEB639906304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8cc47fe63b2eccbb61a2734e3bd78782a2dc9d618749f81762db5e2004845a. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEB630009115.
Dramatic Workshop, Vol. 13: Transcendence
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f91904100abc0c2628b2ba4a802fcda6823a85cf208fa12dc1b83a2e481ec1. 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/DEB632317200.
Summer Serenade - Mladen Franko and the Gerhard Narholz Strings
Over the Rainbow - The Mladen Franko Group
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42be259eebc5988abc0ebe8b36fe61dec4a2d7d544d4bf8f8c573a85d043ea1a. 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/DEB632000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc383395bbeb4fb2c1fe92aeeeac1114bfe6a326a8815d0189e714d601761d5. 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/DED038100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49a898160ee701f25ce082a9ce959bf2d1c7a43b9d18731ab2115f93464b62a4. 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/DED038100081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e51a204e22293a15d87ef1c1d6f79fad01de535414fe8fb1a5fdd981340dc15. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEB639107301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c123fa31dbd273f014de25d4a3266b63d97cb9100c6c509d8ed745041051c5. 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/DEEP80700232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ce8e0595690212451b43c9b0d4c2d9627b6e5b14e493c5169a3318a9270c54. 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/DEEP80700236.