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 0x62f7d2a0dc33dbbeda7afffd2f02739d6ffa595f8f05d907376f49c2face55f3. Chain 2 (Bitcoin): anchored in block 953909 (2026-06-16T07:53:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0a629f79-8309-478e-b03e-0ffc2dd093d5.json and https://artists.proofprofile.net/proofs/artist/0a629f79-8309-478e-b03e-0ffc2dd093d5.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 0xbf25bb090c2ab9c54ddc50a81e4f6a2fe2cf5204101657d68338943cb23669e5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TR0231000069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc750b613f2712bcbb60dedc21689c548e77739d36acead69d3605cdcb1870658. 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/TR0231000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba868df88bab3077cb7bddfd2fab683be67e97c78de1ae5dca79a8db30502e52. 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/TR0231000071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d1b658ddb72988001dffe137474bdac86a569be0e9c01b044ff0786d6b0ba. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TR0231000074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fed9b2bc22d9265a0579f56ff014327217536f84b18c91c5b5a20480c753c1. 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/TR0231000076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e68174b0d1f5b4d4070a82afd193d7fcc3ab24e2d048f112b114dd582fc2afe. 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/TR0231000079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1441a362671189f536ea9a852b3e7645af496f3fcce70de79cf6ac9d34a85380. 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/TR0231000081.
30. Akbank Caz Festivali: Dün, Bugün, Yarin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c0aa3caa4d53945ab1582f27a1b7f80c6610c613e523bf31c37ddcb65a91f25. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92034783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c9b486b4badf29249477d1ac3b5343141efa9d0c128878f492b73a49ad3c91. 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/QMBZ92034784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccbbe1cfe555cecb9a36937b68befb4ba57537576d5cf6d1164de6a007b09e3. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QMBZ92034787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674286a045c64391f891ff85fa89d2dadab4700454a230ae6b9742ab035d5693. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMBZ92034789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52ac04df0d7eb5cdde252501c5e5b0e8196583c1bab8f7bada1fb58a8cd4788e. 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/QMBZ92034798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3221068cfb4b1be472fdd16f381f4a993b102a66f62f45724b9dc711c79dab10. 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/QMBZ92034812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd43e8fce572841d7afbd4f94570e8f151d73fd828a989abf977aa2601ccb460a. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEL121405701.