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 0xe8db8792a89c6e011b8a10bb172dda33777d950b3339f51f754be278104e8528. Chain 2 (Bitcoin): anchored in block 953625 (2026-06-14T11:37:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/25c33c71-b261-4cfc-8be0-983e0812b192.json and https://artists.proofprofile.net/proofs/artist/25c33c71-b261-4cfc-8be0-983e0812b192.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 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 0x2cf40df1a573dd4bd9d57808a8b0d7c32693ae717003bbdb832ecb5ca50fd4f2. 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/ATB571825039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fbf9dcfb7c0480fcda66d9064500f64bf23e9bfa0b6682c9e3f10b0533a7d9. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/ATB571720105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbee6b60ef69b587450d27723f3619660c36e6870b3c52044cf98573f6c529e16. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ATB571720117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf655c27aee628144011d1041842f39fa0a727b36176b2c38ee922948966daebe. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ATB571720114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ba441af618198b13b6fe258a41cb9b2df5861f5074445426582012a2d6e426. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ATB571720113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80218db30622fe1ed11d9480d103bebccbeded04363e2e825966bd128814b4cc. 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/ATB571720108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c9add0331643dc010240ae809a06149acdbd964d9eb9bf10c8c9b53a577c21. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ATB571720106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294e24809a672462abc261468c5fa913a04cce8155d105bfef1bd53d8dff0c47. 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/ATB571720101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fbf9dcfb7c0480fcda66d9064500f64bf23e9bfa0b6682c9e3f10b0533a7d9. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/ATB571720105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf117f05ef568ba131850b7679b4a6c258753c864fd91b35d4e2440c1386edb0e. 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/ATB571720103.
So schön ist Marschmusik (20 Blasmusik Märsche)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f8fc2c23716fcb7febec4f7706e1b566dbd3f3a80ec44e441524c312e8119b. 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/ATB571825031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc796684a98baba2f43be515a5fc47e08f7b3d2a99dbd980c924849c42ccb7b. 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/ATB571825032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69e262f6bf0907c43a13fae56c04ec6b9eb036046c23826e428e2fb013266ebe. 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/ATB571825033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88aa39a324dc043820644b8663b1cd1c3bec20eb6acb8a1ed373b963594ae0d2. 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/ATB571825034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c15d47fdff6759661c3dffefa72ef682221c3c66de914243f70fb36d9758588. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ATB571825036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ae5a4a94cf515ac402f0d34a02fc4e926db200f624b659d401641db1b962e2. 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/ATB571825035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49182a2c2121fde7d913aef3754e12d611582d0b5507ca3df7b6c0b5c114f1d. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ATB571825037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30430c07349a65de512d63a4bd506c60e1d3d77bff498fefc7ebba533f145df7. 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/ATB571825038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf40df1a573dd4bd9d57808a8b0d7c32693ae717003bbdb832ecb5ca50fd4f2. 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/ATB571825039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9e96d6ab70465d0ae65f3b879a6c0f05d8c716027efe8045a6e9ff6b6f68d4. 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/ATB571825041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2871f471a9bde5e9e758c07b863a15c0918339331333955dc338533eb50e52a8. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/ATB571825043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1680c107628812ff65fdc7035456ee6ded751f3746afc2effd18feb947b3ce14. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/ATB571825046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b02a3e15a99b0e72c335bf5d3c54e24d0b04550b4d9f9c5d2d280e0b14ec2a. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/ATB571825042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda55b4ae21ccef4ecd88e4c99b915f2b50b46ac328303b43c465b7569bff9182. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/ATB571825045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea128651a524b6a4a7d737519b48377dbada92af57838ed4ccd6cc17f6324e2a. 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/ATB571825044.