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 0x265d5a1ce7f633a035705953ed243b8422077096da7483d3fb695222a38fb875. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/798f69ff-8067-4240-b8a0-18b3155f7227.json and https://artists.proofprofile.net/proofs/artist/798f69ff-8067-4240-b8a0-18b3155f7227.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 0xefa923bbb843334ad116e4615a74e087a2f3c9a6ca8ce8b656261b2b6fbaa552. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/QZRP42231538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d76318d5d60994702ff9a8992e21ae87427a1a34ace47e2007f24a9e4576fc2. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZRP42231543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f5900927896c65cc6e17aa8027f46fc8b7b79896ff54a5551f35a52e197e5e. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZRP42233290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce58a2b19b64f3e2e10908eb6ef3f147979377b2a42a79c7a96e8b22748d6d. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/QZRP52207281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d047ba9b2261aa68dd21af19ed0c02f95508549c18ef19b9138c21c43ae95e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZRP42241703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcec0da7feba76588127ad33e49e78082f6c3478260461c7f0fbec2c2758d6. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP42233292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22acc24c0de82cbb9e03f0f6e910bd2f046a76d0eb5c68412de2dae994e3429. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZRP42286986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0688fdffa74d8fa684c33dde8771f9606427b96f89532b44cfafa3569815a4cb. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZRP42231534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbdc6e7f332ff68ea39d83bb82912b864b77d15605863649864e66584ddc586. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZRP42232735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec95a7d189e7e7f30352ba2a0b9ea030d0d437ab9c16348cba17ed9c3b67e2f5. 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/QZES72391444.
Thalassaki mou & Kontilies Anatolikis Kritis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x939605d6c788f32cd481e4dcd09196f48cb152a7d36746228d6f7ee245d0ff9f. 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/QZTB82323730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a697632b2b83b20b7a7ef9be4e1d0214fd22b832de544b40c414fa6f809861. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZMEN2437640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd308e9c094cf53bee0636f7573075712e163c2556ac7face739933c54368c2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZPLR2481161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b06a82087b4a06fd88c35d74cbbb41202660698009c832558d8ad8ac52c8178. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/QZTAW2434402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f71022055c127766ffe68a81bdfab57d49550f424518e1ac036c31150f5f06e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZMEP2524347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d006726c3673829444d9a8fef828a97797ab3b18271512a039bc8476d7b5895. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZZ7M2528688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9559ae9170042a6587fe3bee9f115ef1579b5df11ed5c21f372e990340f65b53. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F52508447.