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 0x505c051874a584f4e5232af9c1513daa8cccd91b98a6f437f92b33e7fdec381e. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e5091053-5b6a-4a03-a681-4ac88f23e84a.json and https://artists.proofprofile.net/proofs/artist/e5091053-5b6a-4a03-a681-4ac88f23e84a.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 0x4b837359ce76dd92565c41b332c4ed5f22b1417eb7b10ccc32da7e18e4dd8c36. 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/GBASH2373101.
Montgomery Variations: II. Prayer Meeting
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5860aef08c9996f621efbac0e9bf6c7ebb0c71c3be236dd3eef15ab8ff795ef7. 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/GBASH2373102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537037c175e4b59f341f425ccdc8e54c4f4394220868f1372b8d3a64b7044e9d. 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/GBASH2373103.
Montgomery Variations: IV. Dawn in Dixie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad243bca862fc5f0911698ace8583ec458cefef248d8b1f426f51366974fb44. 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/GBASH2373104.
Montgomery Variations: V. One Sunday in the South
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182283bd873a297c874495e20ced27fc1e32a76eacc0501a04d9c9f5f1910d99. 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/GBASH2373105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dc87f56ecec98d3ce650f139f88466a68985e4865262bcba160a827b86ed0a. 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/GBASH2373106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28288feea9d601904aee1fcc7eaf942e015f75cd4101e9eb22b6d582c0ac1bc7. 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/GBASH2373107.
Concerto for Orchestra: I. Toccata. Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd97d4cf8a51be2626ba642717fe5b8b32c4feb11e5d8c7588b23d7afc8f1d5e9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBASH2373108.
Concerto for Orchestra: II. Arioso. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7fe61b039f3c2b9376923dcf60b213638d7b1e771c4c0f1879f2de1c21257c. 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/GBASH2373109.
Concerto for Orchestra: III. Passacaglia. Andante
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095bc20bb93ba5c9e2ebac9f5b41f010338971b78d75673312a94abe56a35945. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBASH2373110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5ca1a822aa1eff49e3d20cd727664583f481739041a09f6d41fd066ab2f310. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/GBASH2373111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d95ff2c3bd7f0412cbdf2db2a4ae63111cd7682587d85209354597ae3cf7fec. 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/GBASH2269904.
Symphony No. 1, "Afro-American": III. Humor. Animato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c58a9edc2f9b87231fd5428c6c949f94f7931d7efc54e8ea3f4b662402bb43. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBASH2269907.
Montgomery Variations: Montgomery Variations: I. Decision
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b837359ce76dd92565c41b332c4ed5f22b1417eb7b10ccc32da7e18e4dd8c36. 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/GBASH2373101.