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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aeedf4c558cf528b3d857491af125fa65a41f512d914fec1a7878624535992. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5b8d020f-376a-4796-a146-5d117cb6ad75.json and https://artists.proofprofile.net/proofs/artist/5b8d020f-376a-4796-a146-5d117cb6ad75.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Renaissance & Baroque Guitar, Vol. II: Domenico Pellegrini
Armoniosi concerti sopra la chitarra spagnuola: Chiaccona in parte variate alla vera spagnuola
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d7e730b5cf36106cd0301aee138adb0366940d262c98e1e6701085a90e9369. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBLLH1957403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee8cd8a74c14a9450a2503ff28d03b514fb3adf49120ae55102b5bab89b51bd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DECP61010016.
Alfabeto: Foscarini, Pellegrini, Granata, Corbetta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a43d64122d51a5545d698178de5007e54538823a044e13fde9c319e37117fae. Chain 2 (Bitcoin): anchored in block 957013 (2026-07-07T08:31:11Z), 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/FRZ130101170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee8dc617228d558876c648e2656bf0208325cc1f633d204459aed34b2a804ba. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/FR50X2306603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47c8c0e443b23550c10fa86e9c9c180f3a980b403ad8b67b501e196e6df4162. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/FR50X2306607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc7a00a5e2e68df9e048b56abc037d2fc446b5c8c4e2f6c0c2623c192e1abb8. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/FR50X2306616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ee543997fe5d018d2ab449ab7cc7a4108ab0bb660e175af8bfe7754a19890. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:11Z), 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/FR50X2306604.
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 0xc858e2a139735ac617a61d732e96da80d9d1b0c3e6f684577db0c6ba6f2f9a3d. 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/FRZ131442080.
Armoniosi concerti sopra la chitarra spagnuola: Allemanda
Meraviglia d'amore: Love Songs from 17th Century Italy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f6f1db712797912318384255e8155af99cc67b8af3516a8a82f074bdb6a8a. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/DECP61703006.
Armoniosi concerti sopra la chitarra spagnuola: Brando
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ca5716a5a55f867e63a46948b62c4fe4b7d0f2bb8af098b35782d7f60cc5e17. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DECP61703017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb687e04ba9475435e9a09f8e254704912cc960d5d71b2b9ee8ce5ab2baf146ef. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DECP61010025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65612fa1a4bbb8cda8a85675df22266b1970fa86e75ca4ee2229bd283bcd9c87. 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/FR50X2306608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b16432f6610b033244fd5f1053738c5a1806140cdfbbf43a109480ab4cc038c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/FR50X2306613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c4e033c7bfe34b0af9abb28880a32fc0b8373f3c3ce3da8b207797de78dd19. 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/FR50X2306623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae053b25278daa29dd970533ac91d0dc23b7570421ccca31bd20b448ec448cf. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR50X2306625.