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 0xf1b32b6c2ef2c8971a72a3992996078f25fc39841407e66b50540e8859ff017e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ae13bfe-e298-48d3-8e1e-0a0b662fc620.json and https://artists.proofprofile.net/proofs/artist/5ae13bfe-e298-48d3-8e1e-0a0b662fc620.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 0xcff9f083b3ac6d0c55c518cb67115aabac2daf4573ef7ad636daa70c2e7bc897. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEZ650711855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5713db7d7ca23cc20559af2c68f07d01f472c4e4997c41b2441e69e338c1444. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEZ650711857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7fe89f0a751508e1ff279ffba8c029cb848c5f9ecd832e75d0937bdfaab32b7. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:42:21Z), 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/DEZ650711862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd71cc875c1460863590e6abc92586f4181ce48214b85030f8a696f2bb3460c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:26:34Z), 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/DEZ650711847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19cdba52421e18bce7831ddfe12dc56885d6ed7ad9ce662aa300adedf6176440. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:12:57Z), 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/DEZ650711849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48db66706ce37aee9c488c3d204fb43cfde4f7ba62f9b3aee23d9e8144e0f6. 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/DEZ650713991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc980ef019b291dd3f848abd719bf0757eb5a0f65d4155acaec6087b2473332. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ650713996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91234d69b4ed108e5bff32fb6f4c316bf3599abf0b5c800825215d3834413f59. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZ651031679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2b2ba700f721a24bd2154ce277db9575e92244627cf05fd54f3531d5219715. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEZ651031680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329d15dbca7f5ae6a26cbe780471892ee29f2668d7ffda15f0d4792a7a415ff3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651031681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113112983434005051db5fab2bc5f3d83cab3e74864cb9240a72fab6806fd36b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:10Z), 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/DEZ651031684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0855c5992ba4cca00309a83e658cae1df2f1a606affc1c660a1afb149da042bf. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEZ651031685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bda047948de0174681c680a01727fbc4d7a8e8863e2f59de5575e0a4a222bfe. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/DEZ651031687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a808e879714180a91e311885a239a10ba8a8f7cb6800067e22474d814ac976b. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DES091400120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46cc265f46587bec1f963f930594b13c08fbe789edc273a8fbf232d06a57dc18. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES091400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd551c5792de7c1bad69a327345ffcb084b1d6501adebe3e079df975e53a3ba. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DES091400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfbad295a479e76c024a8d829bfbf0e9ec94a0f520639785b94d9c5b0af79bf. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DES091400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06af56a8240c24f3380a366b725305cee7e85b6e5457ab3805ec69bb6228aba6. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/DES091400082.
Mein Hamburg lieb ich sehr (Stadionversion)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedddc39e126fedd195f86f1ec8e2b5e9f5334a7c5428223eb72abc969a4a6add. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:58:51Z), 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/DES091400429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e037de5c70e60a69618a93f1a48bffbb6dc9a9b0b6aec5a99b3453fb0bd79b. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DES091400430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c233fc8ed549624b5043462a35963d5b5f14b8b330fc4a144d919ed15930b1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/DES091400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664da4f84f5552c0db634465ee32724162be2d41adaf38b3a945b2c7b80b644c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DES091400433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ced857ecbacfa7fc419d1f3bb4fcd44eaa2e4dbf945e390e64240ae8966e2e1. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/DES091400434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b25bf6795088429c2459e539fcf811789374b81c20b5e9c91f892a57d96eb3. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/FR96X1807849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf644a5ce5c91825258400d762317e0dd72a16dea08bb9140d18b2f67d79d6451. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X1807850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07b580818714848d4ec36410e06a8851602816dbd06115a98dd93d3e0130617. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:49:29Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DES091400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04001f0b6acdb8b30efbedfd1d93f18ec5d83dd195ace19725da1c22ec475f06. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DES091400467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bdf4344db5a3af091eb679e85040860449aa5701b4067f42bc52a5aff0f1ef. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/DES091400471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7392d5f664fe99edc5c4bb26a3867b4d8e31e9d905bf27c444c99a3760ca30d8. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:41:13Z), 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/DES091400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1be89291d4b38b3df3f1d645bf1a55d833358d9e955599fe768ad7cfdb72486. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:11Z), 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/DES091400474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab63ee7db1f2ce4f7baf8eb48d58a13182ce4c505e70af4b5cfa536aa42c0bb0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DES091400476.
Die Elbe rauf nach Hamburg (Live in Hamburg)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5443720421da8d6f60058569f15f9b168257b4679b37f0a597989934b8c190a8. 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/DES091400569.
Volkspark Calling (Supporters Underground Sampler Vol.1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0ee12acf0d1106ea19703be4a5815f6fc489ac3969b38d54b533e400567fc0. 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/DES091400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6962e6c15845cc87df7c2acc41b0c79251b1a058dad6193a4826216714ac8cf. 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/DES091400183.
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