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 0x6d38a5f931f85fb0493ac66eb89f64592bf79434bceb6765a1a34f964b4172d3. 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/257a4525-d4e4-4ae8-8771-4cceee48c197.json and https://artists.proofprofile.net/proofs/artist/257a4525-d4e4-4ae8-8771-4cceee48c197.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Meistermärchen 2007 [Die inoffizielle VFB Meisterschaftshymne 2007]
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 0x7f48b2c83b0f881876cc94aa7545b3f9605ee8975d1993d1daab8f77bc5a7413. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEG039945201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9fa078434b0226ee363498043ee2d4a856fed4b9c4d33512ac48e6e2974a695. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG039945202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dfecde52fc07b4aa6b1cc1ca082b2637ee35efdd7173c96a1b50dd78220cb9. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DEG039945204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd767887ad39778e614182a2618c440050a2abf0680d7f7139db4502a1b1ac4f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/DEG039945206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3258eb4744786d3f64ad0b4e0a4a9d01e3eb622f0e54da332bfe4c3050633634. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG039945207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64b596ee6c12750b564f3df7ec4a0d35bf1b86109aa13041b73f4943517a433. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG039945208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde07b8816a97dc38198910ba2fc937b23a5df05980f06e64f41c52728dcdf671. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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/DEG039945209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0f73ec092b262454f47abf0824edd96bcc7e205a33b9862decfcd3bb1766d6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DEG039945211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda581ffe0788689fe2c67f452cc6aac7110d97c1f1678003e58e1b1dbe3ffc01. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG039945212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9374337e70955700fe8e72b73459dd8503286cdefb04a89546cba66e57693092. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEG039945214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bf6a4b740bb4a496bf0173359a7637a5d53366033bfdb047e2c0db25dd04e9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEG039945216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8624d4159a20820b6b30ca3dfb328b8402d0458ab8cefd6f204aa8ecd1cc29. 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/DES371900186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6f3707508e0ec5237fa8c4dbb0a1ccbe8c56150b3aac51527cfc8b180dcdc. 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/DEZ901901428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428f31f301ac96bb7053b235b5d2fa1efbc1b4a66fa0f44be2c7de9552aa138a. 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/DEG037924202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6f3707508e0ec5237fa8c4dbb0a1ccbe8c56150b3aac51527cfc8b180dcdc. 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/DEZ901901428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6f3707508e0ec5237fa8c4dbb0a1ccbe8c56150b3aac51527cfc8b180dcdc. 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/DEZ901901428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d6f3707508e0ec5237fa8c4dbb0a1ccbe8c56150b3aac51527cfc8b180dcdc. 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/DEZ901901428.