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 0x68d347732942783a2a3adebb5c3350f4651547dab3481e1725d4d5f7f6c24f3c. Chain 2 (Bitcoin): anchored in block 953618 (2026-06-14T09:16:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1bae27bf-1dcb-4f4c-8c07-b039349cae7c.json and https://artists.proofprofile.net/proofs/artist/1bae27bf-1dcb-4f4c-8c07-b039349cae7c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x98478445e57fbf32de0da0381e8157eab13e46c5ce9fc6782c89f8d318821292. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLLH0812703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0798fec79b4b74f6f4e69d9ee830ff3178680ba2b08c228fedc31e8d017bb269. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBLLH0812704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0401a4cafaee0660bd0671af8df9903ca12fb4c869e4de8e4f3a9e598bfd44df. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBLLH0812706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a35307c1e0d957b1eb630d07a7b9e33781968e8e2b8c4566fdfa1a9b565f9e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBLLH0812707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedaec828c87c9df68cd01f2b4e73898c15f0a5bb8a72714ff6aaf28aa89e903. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBLLH0812708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5f2ffd95f97c18435d3df2b63c2c125ed31e030fa3398ada16adde836e9fa60. 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/GBLLH0812709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6625803e2abb36d0e4012dbd6032c93598c117024b48d30e8f00f86fae7ae1b6. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/GBLLH0812701.
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 0xe6ae02f60888d380bab1fd3128ed529589678460d78d36518b7c7868cb612e09. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/GBLLH0812702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd47b56a4f3cbd29b7b2a153da566c80b2e30567c0674cc610a62897f6f2ede. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLLH0812705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba473d95d625e110b18a28cb5ebb342fa1e6b5f7ba4593ad8e49156f3b15b8be. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBLLH0812710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc76cffe219aee94e61e1ad4fda91b37b1dfab32a89c526cc3e68ae39c9ea5a. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBLLH0812711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87c66094a805e81155fb6f50bdb9a70c13f56868284ddcc778764c36e7746f38. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBLLH1123503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a88045a7ffe6cd8f7b728c562a379215a3c21d0d905af51116b83cdb4d6a23. 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/GBLLH1123508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe543a72a91b22e5ab8fa1e748fcfb00f708f5c7c31ced8fdc53839ad6243a3bd. 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/USA560554918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e36258ec5e6adfe174283490fcabe02007bab43beed7956aef68b08f7246b5e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBLLH0608509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc459dcafddff78a0ce6d45844cd3f591ce61936b95a0562016d3452e27f46a41. 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/GBLLH0608501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7699ff470be62aa01a349ecea12a24a2391aac95b4b6af3aea443bd065e82f1. 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/GBLLH0608513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12b4ce01bd88fb704b592c67ee2c5a5cf14b01659a806a38f1cfe9f2ee6f81bc. 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/GBLLH1019707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3672c2f742cd23c6e9ee957bd24da764675d3a1e109d3f2f7320a020d56cc9c. 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/GBLLH1126704.
Songs of Farewell: My Soul, There is a Country
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd064e538c7de6c676dda4c35f2c0673ee4d808e212f1b0dbf96215ce321c1170. 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/QMDA71408677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb39eb04280404328dae15c9a81ba89a2303a8a2bbef47341ff430e345f3473. 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/GBLLH1228303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc1fcd52f7c3ca5213e4b58dd48a6c5949a24beec6f6c3d7ab0270336df1c8e. 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/USA561326681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8cfd4b72dd5c37facb3220ff2dfe90852b608f6c19f2e64f0f24ed8d55085e5. 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/GBLLH1230401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa585762fc01ce61e48601fd88481e116e58dc4b324be42ca36f4943ac100c661. 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/USA560540842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed9c9c5383c59b88013f7f7ca86931605ea980ba6a1df5febc2933b35229d4e. 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/USA370562209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cec3b849f846d23786aab9d12cac285faab20564e6f133077a3d9c9085c35c. 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/GBLLH0608506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a909d7a6da48a90067a911aba368158e76276717fdaa0cec0c452f013fe502. 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/GBLLH0710403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eed5297fc2a4db2976f178a47c1d4035c278696b36097468eaa77df3fad7def. 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/GBLLH1123502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99528c5f9468ab59a791ec53eec863bb89391b44bf0af6c27a3e98d38533c29d. 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/GBTHM0701484.
A Classical Anthology: Renaissance (Over 2 Hours)
Drop down, ye heavens: Advent antiphons for Choir & Saxophone