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 0x2f66440ac49c343389d32525309bc3e629bc224b163c076af44347435a758111. 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/90802362-72f8-4dba-b976-5d55369cff31.json and https://artists.proofprofile.net/proofs/artist/90802362-72f8-4dba-b976-5d55369cff31.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 0x5ab2301798257bf7c4bbd3610249c69522883cb95649b5450290af88f4e7eca5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/DEA760503714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba7411215857b5fc074d82ad6578ddaa3c4db11237eaa54d41a00b60ab8e5a. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/DEQS91700748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767eb50ce03d134fb7281928229fecfde4e5c1130d10d4ac5b8491d201d26a0d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91700749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b243e9f71455ffafc034127e063f06a784afcb34c6a02a5071a5c9038619bc. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEQS91700754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625f3e6d72f5d3b4c25e57b4ae683b8446f11cdde6b9b6087c7a8e6a16c95f7. 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/DEQS91700752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08de0a1766dfc80aab77246c203a7ac4e9619382179a60a49fa3b5d8633157bb. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/DEQS91700758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14634334bcb3d087d325ff4bd276bf509d6a33b59b7185b99472f5e2256de0. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/DEQS91700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba7411215857b5fc074d82ad6578ddaa3c4db11237eaa54d41a00b60ab8e5a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEQS91700748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767eb50ce03d134fb7281928229fecfde4e5c1130d10d4ac5b8491d201d26a0d. 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/DEQS91700749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3479e5a83a4609c1013ae86a8d0746102f21f3c89756e062b9ab81063155b4bd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEQS91700750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0601221c0da99e982818fb91f7111b034775793bc9252f9b7a0eb95ac6b9cba7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91700751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b243e9f71455ffafc034127e063f06a784afcb34c6a02a5071a5c9038619bc. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/DEQS91700754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625f3e6d72f5d3b4c25e57b4ae683b8446f11cdde6b9b6087c7a8e6a16c95f7. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91700752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5c8e070c47e41ee8be3ba11acbfed88e402484cba6e9a0d2b75afd7b66f543. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91700755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14634334bcb3d087d325ff4bd276bf509d6a33b59b7185b99472f5e2256de0. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cba7411215857b5fc074d82ad6578ddaa3c4db11237eaa54d41a00b60ab8e5a. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/DEQS91700748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b243e9f71455ffafc034127e063f06a784afcb34c6a02a5071a5c9038619bc. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEQS91700754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf625f3e6d72f5d3b4c25e57b4ae683b8446f11cdde6b9b6087c7a8e6a16c95f7. 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/DEQS91700752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e14634334bcb3d087d325ff4bd276bf509d6a33b59b7185b99472f5e2256de0. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/DEQS91700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa2151caaec80d1e8dc62611cfcce9c18cbed6119cf11dfd80dc72b97074fbc. 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/DEQS91900264.
Und manchmal weinst du sicher ein paar Tränen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae40847348ba2bdef83f7e4f96b366a16e625ff2db45bb16172878c62e0c73e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEQS91900270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d113500721ec1c20a4913d9a2911b9309a97545d656353263d68e8b56ec128d. 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/DEQS91900271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272e14bcd20687c7b6eb8e68878b9b1e18442699892429326963f341446f9be1. 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/DEQS91900276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde753be5576069f7961a450a1e3bd8411840cfa698eccdb132ed81effa58de17. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/DEQS92200508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c6b4f01eaa32a011de27bc223643ecc544f8ba27798f44917cdd39fd817f0. 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/DEPS61100168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcf0958c094d79f49c2e7e9d53a738471c8f7f29ca04eec36c52a8765c21bcf. 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/DEQS91500966.
Es klappert die Mühle am rauschenden Bach
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2c91615266476bc57ab89f4228be2016eb3c3e258b5b544754a48665d4a7ea. 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/DEPS61100172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33b678b1a3eb0dd5b275d004c18a10231253c5020a498b2b355eb020a6beb753. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/DEQS91501019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61bc38dd47356fb316d109571cd02132e26d5fbeb3e2ef0ce14c928ff082fa. 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/DEPS61100162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1c158040381cb44ca3598c5ae701195e1953533ed4ac11d31e631563af42c68. 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/DEQS91501007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba384f3270713019fbff71187e970780f44aca7111e24d4f22a6e636fa6953c2. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/DEQS92101398.