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 0x128adf5a3c1d4f3cb25297ba31228319b38867756fbcb2a3fdc062425b8ae25e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a86d56dc-ff85-47f6-836c-469fad6bd67d.json and https://artists.proofprofile.net/proofs/artist/a86d56dc-ff85-47f6-836c-469fad6bd67d.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 0x596f8f249d2ceb0f1bc56eca6c46dcf62142f6ef012a920c856f43f4728816e6. 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/HKG732358415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe15c447ffc560f4d1469150e659a5feb51f12e2c41e628fb8d14e71d508e260. 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/FR10S2436190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7380c35a81f08f2319053a79375496b5e661f6c7bcb5a02d724af44ae3ba8e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/HKG731681853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe76f29a6acbda5d43e64d06972c5f8cf79fd84837d983aab3b3d72735cfbe578. 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/HKG731655775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f878923795c948447dda9d93174d91f013fa35390d901d763e3652dd32adcfe. 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/HKG732376981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f52b42631a2cde3be791386739909fbc7437160c6f18b355b687126defcf40. 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/HKG732374065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692d50d340438ae0607b29916d3b277ddde18389264dcc7a81d5adc8ed998fcc. 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/CNZ632201536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc80ec66de81fdaf07d371e38e254a69811bf9d795e0ab22dfdffffd97567a. 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/HKG732261726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923aa0a0384427416d27b9f078bb933da0dba42bdf8b2ca2b3b5b88ead380a58. 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/HKG732203498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ed1e84f0b78eeed9afe4665807fec83ed7280a59ecbbe4bf81537033baf1dc. 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/HKG731775313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fd9e7243e311190547db27453da9d1d67465e3f0660d59e4a9a212b5c3aafe. 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/HKG732258566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76e3c53c363a4bbf2493020edee4371835b0c9cbe208b0831c963f483a8f5164. 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/HKG732258866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a9833af540c8907c3892c01b8dcfd9e7ba209a2ec8bcee9d48e4627c9ca7ff3. 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/HKG732258758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2045ecbcf4a9e62461ce5a24f5a41651eeb3ac25043dcbe8e746e4cac727dd. 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/HKG732258728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0d00ad225464555708383652d0820d334102e2b99af79bb970d040fb60cd6a. 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/HKG732258793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7de739bd2111b59ac10601d3a59aecbc9613f0a80b6da5d7c1d7d2d1e949d02. 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/HKG732258839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacaf63f9fe3f1516b68ab94059ed4d746909d6bda1b24315015a3a900eb307b9. 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/HKG732258692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba68dc0ee997fa89b8a42299e5a5c5c125ea47b928271d1825693575d4e897be. 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/HKG731591299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c8b45a644e44889d2e83e41b006c9fa92122b9bdb0a0dbecb4817627021a2d. 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/HKG732019278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada443770418d179d34eb52e845c9a9152319d89e14637761cc1f22b59860ec3. 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/HKG732025988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c8b45a644e44889d2e83e41b006c9fa92122b9bdb0a0dbecb4817627021a2d. 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/HKG732019278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a057642a5790a4fb85a8f0cef1c40b048d584b9c77090b622461fe7dcc553e5. 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/HKG732005384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716fcd6ad24a6855842934380ce6e0a29a958df42ad57c92bb15479f2c498813. 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/HKG732011047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ecfc5e8afe81cd518801d893fa2e51b9f87421478566a00bae1da032601f0e. 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/HKG732001839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c3320dd5b17e1cfdb3375900bf49d0d7d8060f4cf46163875a60f7ed3af68d. 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/TWU711906390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a13585c1c786eefd60fcaa388fda51ea73553de21a977053d6ad7076dfd7415. 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/HKG732002045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3ebd5c08bd59b04f482fa2a3c24afcca368214b936c3d69e8022dd1de8675e. 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/HKG732118225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x880210da2af16eaa78db57e2b9cae92d1aa5b98b55d1647a11e000d67d8fe228. 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/HKG731900678.