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 0x477f5ac59f7c4104a1d229be33ab16e34d36df12f26a54d7363b9c3cc53744d1. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3aef2692-3ba2-4229-90c6-ada3f34343d7.json and https://artists.proofprofile.net/proofs/artist/3aef2692-3ba2-4229-90c6-ada3f34343d7.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. Luke Passion: Recitative, Dialogue and Choir
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 0xf53e33bf6fc16b6b2d82890f9da147e9965d6761e4a9276ef5f467facc97745f. 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/SEVAF2000217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f3331831f1d5311da2395772c4075899250b383b92e9bbaeb02d64097dc3f. 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/SEVAF2000203.
St. Luke Passion: Reading, Luk. 23: 8-12
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512ce64a0b2bf22dc860df56ad591573b70d55877629ded3c3a57ef4f9438a90. 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/SEVAF2000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf816c8cd8883e007efd5897094512284283f2d055537eb30f017e88f7ffd1ad. 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/SEVAF2000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4d46403e5ade340f1325162a6cc5f945b96b92945085d0612fbfe091a6a55f5. 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/SEVAF2000221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4fcbedfc4f28b14e7f3815d4a76da964f02ff715f5ae8f4c570f91e5aa9db2e. 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/SEVAF2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb2594f751b595c85fc5cfd7aaa1101c0659fb976fe609781d31fcc8e6d799d. 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/SEVAF2000207.
St. Luke Passion: Recitative, Solo and Choir
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9b2ce023a1dce3b350f738c419b4654c99e8ed7e75b5b883b7a9078ed9e50d. 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/SEVAF2000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fdb61de79534c975173cc93db89a3c4b7d9c7c8cf0c38fdbf4f3a4b84544d5. 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/SEVAF2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3569d0bbc0d0918479d7d14d0d04b8bf90fbbd44a4100c3ba078375037c4752. 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/SEVAF2000224.
St. Luke Passion: Recitative and Solo II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894e9341dd9063a7b0b52679326c09a7a33269c8e9bd2c1e6ed649f0e35482a6. 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/SEVAF2000209.
St. Luke Passion: Recitative, Choir and Solo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b94a40d47cb2644653eb3e3e0732a38da44c1a36414f030730373b6d6e6dc30. 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/SEVAF2000225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ced2ecb6429c7a6214e58806d9f2b13c9e603814b0738066a6c609920cfe45. 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/SEVAF2000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e1b2920309a2e92b9fc96fe97720962c3db776caef3e29e723519e3d15a0c1. 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/SEVAF2000226.
St. Luke Passion: Recitative and Dialogue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8eb7806c59d66caab2ef10cc5c59ead3a2e928d75a744c42b6ef36b67bc69f. 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/SEVAF2000211.
St. Luke Passion: Recitative and Dialogue III
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf3a5da6980f5474a3982c3b8b959bb4471f1aee6581fd669437813f80c79bf. 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/SEVAF2000227.
St. Luke Passion: Recitative and Dialogue II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18c61b63dfea97500cf71be78847ee30e3196b1b3d852061f09e0886ea592cd1. 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/SEVAF2000213.
St. Luke Passion: Reading, Luk 23: 50-56
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a17f44efe43cc56062512344c3b23e263f23f81009cfa1b9df2c9508516171. 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/SEVAF2000229.
St. Luke Passion: Female Choir and Solo, soprano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552ac9854f52540d2f2b1a82414fee2f20f73506042bf7708bd12d86b59648d7. 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/SEVAF2000230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0cc8aa3f9cfde7c910c09558edaad47ca8c9e5c1b34f1a6c9665c9e65f7d26e. 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/SEVAF2000215.
St. Luke Passion: Conclusion – Choir and Soloists, soprano, baritone
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b12584e8e58c0f7fd2027a9ece787c0f3e1ebcb3fbafbafb7de9ebb3b0afff1. 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/SEVAF2000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8863a9ecfa8a674c1d8f9cce831a9495536817abbc70576428eee6d7d7197b. 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/SEVAF2000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeae7bc2cebb84c8d021456c39c6acb432b1b01a9cb5c22d6e1848016ef377a2. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SEVAF2000201.
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 0x34ebf6174316b90890b2831399842457fa6732d2cf6a6a69737392e19550842a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/SEVAF2000218.