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 0xde0b9bfe532fe1af0650a0aac1da9a4e34311f15f9835042522d33128093c63e. 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/4b9c4939-6f1d-4c62-ad2f-26e6351ec7b5.json and https://artists.proofprofile.net/proofs/artist/4b9c4939-6f1d-4c62-ad2f-26e6351ec7b5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Silent Night - Christmas Music for Choir and Organ (Music from St. Ignatius Loyola, Vol. V)
Ginastera: Lamentations of Jeremiah; Schnittke: Concerto for Choir
The Lamentations of Jeremiah, Op. 14: O vos omnes
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 0x94dd0b2e7a2d819a5fa51342f40d113d2927d4329bfcb24f751dd4332e949aa0. Chain 2 (Bitcoin): anchored in block 957056 (2026-07-07T15:15:30Z), 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/USBZ91110051.
The Lamentations of Jeremiah, Op. 14: Recordare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2715dc699402f06691ccfa77088b16518052c130aadc8d505973ca137dc7108b. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USBZ91110053.
The Lamentations of Jeremiah, Op. 14: Ego vir videns
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0817b7a38d7cbbfe4870e93aa690dfcf4a78379f9d37494317786f8950d8e85. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USBZ91110052.
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 0x14b1176ac1a6971630b5e44ea797c926ab90bfc9453f8a88553151fb84ca0c22. 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/USBZ91010060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b279f728260657e458453a8697b7b57f2040d6ad4a89272d8f15db1b8a2d4f. 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/USBZ91010061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fba4a0bcaddbd39d7457c4da6f8d9a4652854c235f29f62e616dd4c9dc1f6a. 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/USBZ91010062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fca8b8e438f27fc5ba736457c135b34f83527f092270f6a08efa1e63b02d6be. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USBZ91010058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4627e29e45c797d78244720a7e6ef37eb19bfa2d5c694cffbebe9eb190ddcc. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USBZ91010059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0eae825a51cf0ea2dd7402c32542a149364ddb85181e61e9d88b410e88dc33. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USBZ91010063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4801b27beef6a81b6dec74b5fb4bceff2a35ef6a6a40535a9179e52081c022a0. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/USBZ91010064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2338f0d14b9ce02944e5f866f116fdbe0f1a16b0fe153758f6f07ac4146bd86. 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/USBZ91010065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd32128e073d272973a453636942cd571b1bc3e603577086a1a12fac0de48ad3. 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/USBZ91010066.
O Vos Omnes - Music for Lent and Holy Week
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66b6265b369330156a85235ca64a0b8d5e04cb53a0888e11c9a5fcd2b1daab6d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USBZ91300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c4cf7d03d7c231e7cca8dcb9186b3d6bd68e08c4a651084897baff0e398d6f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USBZ91300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd92577c4a93d9b4115798cf0f77a64019c78f9d16382079e5fb11e8ff935a81. 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/USBZ91300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32f14bda6a779c91b2cf1926d00bc5c43b6ce1a83b06c8dc7a4d4eb75d4eae9d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USBZ91300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdc1c8cc559d9df56ee24e7d2f0794a30b0123b04d1bc2d910dc9a9425556d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USBZ91300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99cd4a2eba0be8d94afc61663f1e23b499df35f7e6ef0c0e82d5d911482b9a03. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USBZ91300066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6ecce6fda4c10cabd2b86ea58eefcd7a4f89c0a111a830ebf8885bae1ccce33. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USBZ91300067.
O homo considera / O homo de pulbere / Filiae Jerusalem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5b8f989113b57439a89e8d7a227e77488d8bf3c1f08df8d5c420f50658725e. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/USBZ91300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6df8ac201d66738b9e67ac066f806a0d32c0794e13118a46d4703e419c4f412. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:33Z), 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/USBZ91300065.