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 0x663b5f34cc939dea9b9c268fa5193dc0bd02ee9858135149b5fa0644298f75b2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/556f1b83-b99f-4f8e-a9ec-ff6e70020bc6.json and https://artists.proofprofile.net/proofs/artist/556f1b83-b99f-4f8e-a9ec-ff6e70020bc6.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 0xa181e7882de808707655997be79bc4385f24619dc3def65703e4a9b469c22d37. 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/HKI190159213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf24ab1a332680ff1db4033aa25ec09589bb6e8e027281687524cd50bc7924d49. 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/HKI190159214.
Turandot: Act III Scene 1: Principessa divina!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c76e6bf97fc38a15ac302105f75bc97b49a09941f1a3558c9bbeea7b65c941. 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/HKI190159312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba989bb1a5b0aa0799b48fbbc62872896afccf4e90cdb098e0c3906558dbd4e. 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/HKI190159206.
Turandot: Act III Scene 2: Diecimila anni al nostro Imperatore!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x857e82ab51f18768bf158ea92c3974c6c7099446cfb9c38bce25a59732c05e88. 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/HKI190159321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe32c4d5b20904621ba49dd2a6fb5521e526221c81ba80a21c284a0ec659a50b. 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/HKI190159201.
Turandot: Act II Scene 1: Ho una casa nell'Honan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c964d7723414e2c63e39f638edae14d2609996b25b1e83dbe4a291e1ef623. 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/HKI190159218.
Turandot: Act III Scene 1: Nessun dorma!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc910e47fb31b3fd2fd5f9fcb401bc07461314c13406b10a6fc5d460f81bfc252. 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/HKI190159310.
Turandot: Act III Scene 1: Tu, che di gel sei cinta
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe790b685a38e7d978608b30c30a341cf9116b9befc2e0c280e596271d2fa7a9f. 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/HKI190159315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e98491baa4093b56cc3953ca66688322d485397241dfd2e9180d7e904830a13. 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/HKI190159204.
Turandot: Act II Scene 2: In questa reggia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa66e96f15caa067347960a76c66a064305ee95744040a83eef5f9048ef3f831e. 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/HKI190159301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3c2bbe59f955af9e6662b313a5e490a3ce923333a2d1843766d326646ebc52. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190159205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d446a5ac6d87fe4ea627369cc7a4dfdc3f4b4a8d1580eea11d082d1334e4d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190159208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a28338a8f34bdd3dc2172e628e8e9a0793267b332e14c6dd6247c6ae664314. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKI190159210.