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 0xcf9c102fcb5bd69fda57de978cd31bd71df104f9bf11e961613812df289f194d. 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/c5c5c825-d723-4fb5-9dcd-b17d68082b6f.json and https://artists.proofprofile.net/proofs/artist/c5c5c825-d723-4fb5-9dcd-b17d68082b6f.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Kapitel 1 - 01: Auf der Spur der Wildpferde
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 0x9729f8e661fc7c81320ae400b15b8be8e917e05cc758ae5329dd3c883aad78fc. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123696 — a six-check JSON result.
Kapitel 2 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efcbe2a9e8809958d8cd88e49b3c965720a8bf346b3d4bb4094deb531d68fb8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123697 — a six-check JSON result.
Kapitel 4 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824ed755c27782b01e46197e8920dde5868298c3d7965ab55fe79a00b92b8374. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123699 — a six-check JSON result.
Kapitel 5 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45000549cd03a7cb0db59bef14be1ada8a3d7de8fd502d352a10ffe7a086249f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123700 — a six-check JSON result.
Kapitel 6 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b3dc45c998fa67c6e3e3d29e98666a059c518acaba11eea7b2d1770a19d701. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123701 — a six-check JSON result.
Kapitel 7 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467f1b5b28d844b57f06f4ff51628c62242f9d2c38ac5ad1970c37a0401e3582. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123702 — a six-check JSON result.
Kapitel 8 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fcf87a54db283fdf62d34565672aee977b1255e7afa570c94d325f6d8dbb14. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123703 — a six-check JSON result.
Kapitel 9 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc16c5aa688b82125faef195bf45d470c93144ff0390b764d888191eb98c29923. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123704 — a six-check JSON result.
Kapitel 10 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb7d2edd71000efa3841219eb6b6b0986304eea6f72ddc16c5a3b3a09eb9699f. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123705 — a six-check JSON result.
Kapitel 11 - 01: Auf der Spur der Wildpferde
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b1e771f98dcae4eda36d7d17cdc659479ef3053a9dd73c1c3b97db4924fdb7e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123706 — a six-check JSON result.
Kapitel 1 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d24742da43894aed10052ba01450e14f5ecc4ac293e6eee083a8023de20db94. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123709 — a six-check JSON result.
Kapitel 2 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd983672604279721d8eb0b71ddb3ffd635f081b995d18a661fa985c1f80b7d9d. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123710 — a six-check JSON result.
Kapitel 3 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3691bb6224fc02ed473119a925b345c0aebdaf334a7fdfdaf6dd47279563959c. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123711 — a six-check JSON result.
Kapitel 4 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f153781dec2ce576b3dd61d2458bff5b1093020d152c5cd4dd9c81c07650f5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123712 — a six-check JSON result.
Kapitel 5 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d59e33cd0482346ed984f9706833535ca8b14e7184699fb9fa5b85458bf4da8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123713 — a six-check JSON result.
Kapitel 6 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4034fe4814c850d05a895ede5cb20ba1118a9bb4eeab247fdbca11460f9575. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123714 — a six-check JSON result.
Kapitel 10 - 02: Das Versteck in der Prärie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf3b0daa0d07c5329c21172534a32241edfd6efef5bc622e2cb7f7ecac42d4a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123718 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dd0b1e441f1d4f1cfd6c31f244c5c67bb835f1fa2ed7367ec00fa5f32665143. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91119605 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2fe4530e84c72ea4544ad31c08f4dcdb40b677a8c71cd76d1e6dee4a5060a. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91119607 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972345a41162995ff8217de8c987ae76a29c4a5e3e695816e06acf426b14c280. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91119608 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf292e85640c48a51b6dbab79fc09c5c68396baa7924fcc2ae2993bac51d87aad. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91119610 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x296bb913cfcb25991525b70cc99d6498826358d56123d98b9b0815bdf016770e. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123542 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50416f3552ced56bd63be6bc440dd97edae5f82e7663cde59e83b6c410df0320. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123489 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1498dc645a7f87191e8fb0faa3595f5522ce5674482effd5630deaf71ffde09b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123494 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577ddc0a8704cb15d043231dab5bf6fbc19fe8fa60db9af539a94a69ca08693. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123495 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d9ee384a3788b7d8eabfaf6e8166d3ceefb3fda7f1475826c7e6546be2ad35. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123497 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9777a859137d48bed59920f2a0ca7806e24e8a2dfcc111c8b4f6b9d05bdec1a9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123486 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e74b2e51cef232fc4fd972f8f4bc4197809979abc16244c4652e64c9838ad. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123468 — a six-check JSON result.
Kapitel 6 - 11: Das Geheimnis der alten Mühle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b051310e48a19a88ec9073737cde12a7d8076888efaa55e90381ab2ef1a62f. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123612 — a six-check JSON result.
Kapitel 9 - 11: Das Geheimnis der alten Mühle
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec303037af820a54393ff56d95200900e1bac1d00c12b213148c5d9d9e91194. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123615 — a six-check JSON result.
Kapitel 5 - 19: In den Bergen des Aberglaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589743921f0bd21a8c7e638c2844974629b00e1cdfc2f0008a21225e570dfd95. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123594 — a six-check JSON result.
Kapitel 6 - 19: In den Bergen des Aberglaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155148e9f4245b2aa01c0d2f20334b182e078f517fd38c3712be8ef9d0d32a2b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123595 — a six-check JSON result.
Kapitel 16 - 19: In den Bergen des Aberglaubens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281e6e712eb7ad1d9594812d042a2c25ef2f733b5386cd6a92d4567b5085c6f7. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123605 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a3d0b97b23b3ffd2a39a1235ca81a871954afafb18e6db9e7438f7ee0ce774. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEXQ91123526 — a six-check JSON result.