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 0x69c5fa1897e0ee68dbe7d53a85464f7be40345fda25e0dd5d8a2fda74904efaa. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4028feec-1bfc-4a1b-811a-fae628336618.json and https://artists.proofprofile.net/proofs/artist/4028feec-1bfc-4a1b-811a-fae628336618.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fairest Isle: A New National Songbook (English Orpheus 47)
Vivaldi: Arsilda, regina di Ponto, RV 700
MONTEVERDI: Madrigali Erotici e Spirituale
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 0x0acf07e4969adcbce49b2b1e3e68754a9a9b0a175a4977cf8cc47ccf4992b330. 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/USX761216001.
Carmelite Vespers (1707) - (Second Vespers of the Feast of Our Lady of Mount Carmel, Psalm I: Dixit Dominus: Dixit Dominus Domino meo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c437059dd633b6df6993656c372a614aaf75716424ba30fe0baee1bc312453c. 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/GBAYC8701565.
Madrigali Erotici E Spirituali: Quel Augellin Che Canta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8413e4514327a635a27b0a10199c7fdec09ec50af34b6d9a64c8fffe5db49f2. 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/NLN580507582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe112cf93e2b10c3981421da9e7912564d3b6be566c02da1a115fd443ca9c938e. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/USX761216003.
Messiah HWV56, Part 2: He was despised (alto)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4247645d9f67139b0ec9a6d1cb5a0f54ba5034c85d257ffdf7f72d3d7a781f6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBAYC8900073.
Handel: Dixit Dominus, HWV 232: I. Dixit Dominus, Domino meo
Sanctus: Himmlische Klassik / Heavenly Classics
Handel: Messiah, HWV 56, Pt. 1, Scene 1: Accompagnato. "Comfort Ye My People"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a210627709bdd65058fe1246715687df5f46b3dd5cab95e7d4b6a0bfe2d2798. 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/GBAYC8804838.
Madrigali Erotici E Spirituali: Qui Laudes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55431f3745b4835f18f1f523d4c05f1eab3222143a2b4fef0d2b272ba79c7ca1. 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/NLN580507583.
Madrigali Erotici E Spirituali: Sfogava Con Le Stelle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940c52598c017fde4bdcec0c4c6f8b4550599fc08de667c74e92a0ea9cda3d54. 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/NLN580507584.
Madrigali Erotici E Spirituali: O Stellae
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9c06a90805239325eaa159d4982c065288c895e1fc5b5ee77004ddd9045947. 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/NLN580507585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab6f2b062ba8b33e9dec8c8e47f57bebd7368c8c1386103981e7f792ccb1fed. 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/USX761216004.