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 0x2efc6dcc3791952a203fc4a82da92a7be871c268ce2761e89a69b27039130384. 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/bc2864bd-00ed-4ea8-9d04-5e8682b75261.json and https://artists.proofprofile.net/proofs/artist/bc2864bd-00ed-4ea8-9d04-5e8682b75261.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
As Vesta Was from Latmos Hill Descending
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 0xd3bd8555b402eb25786004f70a64cb1b57199d43c5944f73bddd0f61663edd13. 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/GBAJY8101912.
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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ab6f2b062ba8b33e9dec8c8e47f57bebd7368c8c1386103981e7f792ccb1fed. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fc861d9ffca50e7589c009829568778d4adb6490c383ebbbcdb88ce127bfc8. 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/USX761216013.
Cor mio, deh, non languire: 21 Settings on Guarini's Madrigal (c. 1597 - c. 1700)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23df1ff55f90ed40db7d2cac6e4512cebc081480d7953df40fbb4af0a0cb3142. 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/ES7141500571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7b5bb172e697f23d262e1ea0d740637e1419e8aa1421b1107358d80ddda62. 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/ES7141500580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71102b6451f98dda53e560afee44fe583b6d18c5c230355bb907f17534d0a62e. 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/ES7141500581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29178ec281ef17d82b2489c5c2993a371ef22b1de3ff8cc5059bf6bcaa1a8704. 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/ES7141500583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b5db5eedc4695f60270e1dd34057fd0746c53ee77ad39e4e1cf87957772bbc. 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/ES7141500584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb26e97729dcb6b55c6b1f986aca1c74bc589464e188013a80c99cda54cbc7203. 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/ES7141500589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12402c1094e5cfb7d30f85db9a5da4a8525f7db90a85414a9f226f407163627. 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/ES7141500570.
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 0x8b738bc26c2ad3ecc5cc19e48036b1622a2e1b51990745e4811aee91a835f5bf. 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/ES7141500572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5138aec052e5f28d6c0ce91e94a77bccd9fb559513cb1496a5b3fb620c087061. Chain 2 (Bitcoin): anchored in block 960384 (2026-07-31T09:54:03Z), 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/ES7141500575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb148ce140508852d9deba1c2103cc4070d9b89b208a6bafcb240d5834c1801a0. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/ES7141500576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c8f45f313af6c480cbf14450f5493e2eaa1afd272a3245a1d345861b01e061. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ES7141500577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd366acea8aaa6d690cbba066f33f58802cc03f28994f45c776c635872d8cdc. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ES7141500579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52cc416b7d6452f2d9b7b519a65058db7bacb927aa10eaa55ede7001187e3014. 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/ES7141500582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa45016932b777e14e8ede25a39a7c11ad32974c0a89620fa1b72e890c327a9. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ES7141500587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca54bcc24238be29d3bbd038eafd7cb8fe519aeaa6014c5020fbe0f6ffe7cbe1. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/ES7141500588.
Madrigali Erotici E Spirituali: Quel Augellin Che Canta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8413e4514327a635a27b0a10199c7fdec09ec50af34b6d9a64c8fffe5db49f2. 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/NLN580507582.
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: 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: 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.
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.
There Were Three Ravens. Songs, Rounds and Catches by Thomas Ravenscroft
Madrigals, Book 8 (Madrigali guerrieri et amorosi...libro ottavo), Madrigali guerrieri: Altri canti d'amor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6d492ad5aad03de9efb5891ac6831fef0a6f52c859fb25c6b06138900a80f2. 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/GBAYC9001687.