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 0xf6569d8eec76cff4ff019d20eb85934aac08153707a7dbef48bb9047a9b214bf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a0c45524-ad6f-4084-99c9-eef526eace72.json and https://artists.proofprofile.net/proofs/artist/a0c45524-ad6f-4084-99c9-eef526eace72.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Magnificat in D Major, BWV 243: I. Magnificat
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 0x184cba343d35b30ac8ca8bbf54346e1616faf0ace581694d970e4a21f8f3b3c4. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBAYC8901791.
Magnificat in D Major, BWV 243: II. Et exultavit spiritus meus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839aaf93ac19f071425e0adbdf48d33960acbf4105564101abe47615abed0f04. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/GBAYC8901792.
Magnificat in D Major, BWV 243: III. Quia respexit humilitatem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cf477ec95802c59777d99d4d80a3feaaf0f5679cc8135a9886b4e2be2c9e3a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBAYC8901793.
Magnificat in D Major, BWV 243: IV. Omnes generationes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062c35a9aa4318d3e2686f498bd1795ab0c3614e63c707ddaff1a95f06ab4b0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC8901794.
Magnificat in D Major, BWV 243: VIII. Deposuit potentes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b42f1f607eb9b7241e988d476f3e27877ecf6e24ef818e8dec380286c10b8c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBAYC8901798.
MONTEVERDI: Madrigali Erotici e Spirituale
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.
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.
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.
Madrigali Erotici E Spirituali: Plorat Amare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36acb091ec6a4e05a069df2b1d4e67989bf224c1900ac732c991301546d22aa2. 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/NLN580507592.