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 0xdf70e27136d35e882e5287eb098e64823a5a760ddb4e6f5eb43c52ea1203c7ef. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bac1006e-16e5-4134-84c2-bad69464ddaa.json and https://artists.proofprofile.net/proofs/artist/bac1006e-16e5-4134-84c2-bad69464ddaa.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Cifras imaginarias: Música para tañer a dos vihuelas
Praeter rerum seriem (Arr. for 2 Voices & Vihuela)
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 0x6412d19385c7c8df9c6175e701adb28acd1e079f701aac8eece67bd4f071c247. 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/ES7892102202.
Missa fortuna desperata: I. Kyrie (Arr. for 2 Voices & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc12364523aaacfc0d91174f49e02014b068d3e42a1f29d09192e9a2be4e468d. 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/ES7892102203.
Mille regretz, NJE 28.25 (Arr. for Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebef46f74211bf622e23f0e0a35cbf0d21150268a16c206c95b53d437fc98d63. 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/ES7892102204.
Pater noster, qui es in cælis (Arr. for Voice & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d52781be20bcb479eced9937d4034404541b4b54ab1ed3859dc20940e4e7670. 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/ES7892102208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4dca976feef080ef740ff64135c917a4d5d4e0f37ec0827fd65b79c0b6c799. 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/DEB331444102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x373ad48309e66a2958b58147cd0b747548afd43bcb3a89ea1e1a19a8054c738c. 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/DEB331444103.
Nymphes, nappés - Circumdederunt me (Arr. for 2 Voices & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6a87abf9d798f348a7a615d54095d17e8a9b11c3a3671d1e8ca0dd93fb56b5. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ES7892102201.
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
Missa L'homme armé super voces musicales, NJE 6.3: III. Credo. Confiteor (Arr. for Voice & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x701865bd00caec65d5dd0f598c36e403c458e51e1e62bb9e1e519d2fd0c56e34. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES7892102206.
Missa adieu mes amours: I. Kyrie (Arr. for 2 Voices & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9adb40925a273be370b36d4270ba36fc83ee3aea62e1aea978c7b66540fb2f70. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES7892102207.
Stabat Mater (Arr. for 2 Voices & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ccd04447f20bf6448ed8d1813a559ecb89b97cb60f7ae0652a9fcbf098c465. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/ES7892102210.
Nymphes des bois - Requiem (Arr. for 2 Voices & Vihuela)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6eecde8d1449c7f2d988626e6f1c830d975fade110d37712ba5ec9541f47be. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/ES7892102212.
Amores Pasados: Al Son De Los Arroyuelos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8240e7c96ab3935e8bc5d665084ad0bd6dc2dfb003108bc97ad0d899502b25f1. 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/DEB331444101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89bafed5e5164fa7f43d12c7d5cc90e221f0fbb7d817816a685321cd2bc9f0a. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEB331444105.