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 0x321d96882047446b429617e0e6b1c0d44debe52d5ee9d043efc3b27f8fdf3692. 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/23b06121-4c3e-4891-9f9e-090395d56832.json and https://artists.proofprofile.net/proofs/artist/23b06121-4c3e-4891-9f9e-090395d56832.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 0x8757ca3fbae7d75d51561624123d402b6c8f610b2f9b97a603e66813e21266c6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TR3022300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab080bdaec0d5d07ebee37886262a217630f83814d73a3ed9e13283aed964c1. 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/TR0531303883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671e5dc0f22933b8c152c608639740b61a1d44cfb5f36f457ac82f2d48796d1c. 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/TR0531303886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab080bdaec0d5d07ebee37886262a217630f83814d73a3ed9e13283aed964c1. 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/TR0531303883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf790d1fd7c618a8017439973cd8849ed795cb638f04b1906fb01fcb4cefa2ffe. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR0391800185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee93ddf6a31d69ef7836296c697a0c1a35d6bf00456f1c3dd868c1895d7c0367. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TR3141500052.
Ahmet Selçuk İlkan Unutulmayan Şarkılar, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9b906a59e6d55c69ad2f43e2c01823540ae7969e3f60036deaf87fd50a72f7. 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/TR0391800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc207858f4a5418814f8bbe303aea666821345bc09c99632cd917636d2371e1. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEVU91704144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094508a7c82e7784b4275b710a3c390f014c6c25baddca7d340eb9e57110d6c0. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/DEVU91704145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x727867f716f5c7f20aa69da1d6cf5c6e143484dc39cecce596eafeb24cf71ee6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEVU92300627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb01f169c1ca851cdf00c3b3edb746e11c3cd3ff3db5cf7450bec468ae6fcf2a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEVU92300877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa418ec9f7581392ae221c77f235598da6e26b4af265ea6a50b40b0d55f1c6e13. 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/DEVU91701774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aae27f2fd67ab204d3d8d2bbb865973a01c27af28808a140bb6e3ea2e9dd35f. 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/DEVU92300878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b5920bc1a48eeee212055c021a7063968a2216f5f03f9ccf60a77028c8846a. 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/DEVU92300784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7be8c1309f74250f8b4f76170dc589efa92b6739be5456a1926b8c762c8799. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/TR0860640177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a842f4ad61fce468c9feea4b22a728cace0cc8abb344d081128cc5224236d9a. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/TR0860640147.