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 0x09bab578e48acafbfe3ef9f97d8d44845ac598275f57abd248e5f412e27a4e2c. 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/f58ff768-7863-420a-9b43-5ca8d08bbc47.json and https://artists.proofprofile.net/proofs/artist/f58ff768-7863-420a-9b43-5ca8d08bbc47.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 0x1c19c4366c136fa75afe8980fc2b1c91731a4cd760a7ef9ddc5c7d85ef9acc5f. 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/DEGC61401251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10242b6bcc7a066c4748f6f313b7cd8b64a5cf996f0687215ef2f28566ace07. 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/DEGC61401253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e665a5ffa21b9c3456ff208c62885bfec89b7b2016aeb8b3205239ff1359e9. 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/DEGC61401257.
Unterm Untergrund 3 1/2: Upstairs at Björn Eric's
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617330bc498fb17871c2f8871c7b199c132d3e0d3116907f62542ddc14ac63d6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:27:22Z), 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/DEQ121856693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ad8ff064fbf73785167e6459eedf9d893e5d9eab972d1f39b181d7fd97fc66. 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/DEQ121856696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6c8a994b79c38c1944f155d533d56f2464a8adafd1d80d9ec6fdcff22f3610. 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/DEQ121856699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3190aae05ff8e436a760709e1402f2ac8fdfd6382aa2c2e59e8c5e334c4f58e5. 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/DEQ121856700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a9bee5040e1d1a94485fc637ecf10b62085e299a19e586f6219900f2e074ba. 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/DEQ121856702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9df3b340a51e080ac9d41cd6b4d5e2567c134f51f6f0c3b67c79c040f5c4f8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEQ121856704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00886ddcca9c172e0e68023f0dc50deedd106f87adfb3b4829e2e06a0b9b73a. 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/DEZ651333742.
Unterm Untergrund 3 3/4: Jay's Rocco Tribute
Unterm Untergrund 3: Nur wenn dir die Sonne zu hell ist, bist du zu Untergrund
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f723a3495aec15de847986d41a4480bf99cc628cfab676ca15e0c3a47c00288. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEQ121856676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37961c94260709c7903cde8f77f98f386a9b06a21aaafc0f682f5118feb42450. 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/DEQ121856677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1236f4c170fc7a02d81bfa3bad554ad1ad22424d9fc39e03c615dc19c25bc2. 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/DEQ121856679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d269d162ecee8a223cb522c78682feb217136280961889d4222eb7f6cc9ff5. 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/DEQ121856681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553c9b79d974d6d1f508405ae3f66bf30984da96a3163f2d94c974b74a363058. 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/DEQ121856686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd44795189b01fb40600cc8fce228645a3acba08d2f664f9f2f2ac8124983f0. 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/DEQ121856688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc902ebb2757080e53232a698ad7de490dd131483860d45966a6c6cb96c4d752. 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/DEQ121856691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96984294a4f95cb1e3357518c42b10267786d3bf2421f1bf05920203636ae9b2. 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/DEQ121532583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa400a2467d20999445ba845664208553e8f2032e9c7f93ef56b767ceb28f23e5. 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/DEQ121532585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd022664873bd5da90e4b8a8525515618dc02eff281b5ed3f889e8c667e8335ae. 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/DEQ121532586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fdedbea4c6d9e4fdd90aaa9ed49ac562d48764df2f2b174228b1159feca5152. 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/DEQ121532587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22e431e6e9b503d5327df98034d8a655265ae6e9b830705576a69fcb7395337. 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/DEQ121532588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45a9d7a8e193f4b8bd141419c85de9d6fe2dbd9dc02ce32a169107738625d18. 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/DEQ121532591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a90c19df381aa6f5b81d48b256217500c4b9e6bf561e48250fd2951883e34a6. 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/DEQ121532592.