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 0xb5e7f80f69f4a6225ede22497f41a8bbec951285d0252d9a8ad94ac57201a8d8. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cfbda9ae-cbc7-4247-a235-ef1d9a2cbafa.json and https://artists.proofprofile.net/proofs/artist/cfbda9ae-cbc7-4247-a235-ef1d9a2cbafa.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 0x0291347431490070323d968e4f2c97977a0c4af8d7ce2cef8168157564af2b23. 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/GBRKQ2472493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036f4d97c44d739fc23a4af62cd8d52ccd8df56469bc561a58c75979ce78f62c. 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/GBRKQ2472496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1909a479463246445098c78ab2083f40210a4bdd3a26fcaa2fff9102b22ed0. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/QZTV32382047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654d8f4b52dbc165baf88e0e9b7e60cc837862df31423467e726addc2b816afd. 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/QZK6M2287512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b6564d25505988e8d7c2bec1b787975305d782820aaa727dc296a4cb9cc0f. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:38:17Z), 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/QZ5FN2257051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86777349f3ad6f4ba668c9ef75fb926a7fd47cfd488721a5ac4064f5f63e1e33. 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/QZK6Q2196494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4606d5f12b7e3850c284f2abbbb1b8af492acae4d2900bb5291505df025a175d. 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/QZK6Q1982442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68949ed35fd4505ed7016804faa32731061e93ae7b2fca85dcaf59abaa7202d5. 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/USA2P2262596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4af21b88c0822cb9ca8871883a907d6d911036a7d083ed7f33bd0a1f86e930. 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/USA2P2303640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667b6564d25505988e8d7c2bec1b787975305d782820aaa727dc296a4cb9cc0f. 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/QZ5FN2257051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc658be86dd1181e6f063afdb45103ea7aa0f1dc1579b5fbb36214a663bc50c. 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/USA2P2303645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b8a98270e0ecd7579697e6f64b4e11bb2af0b8198f776d127bb64f29f12b1. 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/USA2P2303641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3e6a98a00e8f6120d4975a475341239e72d4f3080be9f9862a941746601622. 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/USA2P2300993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc790bf9eb33b5bcaa19f5a8b412d7b00633f7f961a23c7398c13c6a16701d209. 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/USA2P2361151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a2f35cd7be7be42d7c51646b59d68119a935f579f31aaa69cffaee53c4c353. 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/USA2P2336257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa872fdceabdaaf70edc37f6e626b55b8ae3335bd567597c3be02fc9060c2b0c9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2361153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a237d8a88cc98c80f37355ae2ee73b1ee86f403d5fda80eade7c30925d0a70. 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/USA2P2361150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73028179ac1de6d5121726e818e3455801737961bbfa5486ca5cf446435bdd3f. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA2P2361152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd243e34e172e8dd511f4121b9d54b822020dbe5d86cf39f431c09c0eda7887ea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USA2P2333366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea30676b824d2db8099ef82dc05b6ddbcfa273c482584610a74f72190eee314. 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/USA2P2361149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46622df84ad7310d31de6160f22a04aa8597a52660478602112ce0f077fc5ed6. 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/USLZJ2061682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa541a8dbe13ce6d5e2dbbc1bf0a34865f616f06949f62070e527e449fec7ed36. 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/USLZJ2061568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4817b5dd9ff03d7e98d65f6649daf765768041b151f0e3663c2d02eab71b7d70. 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/USLZJ2061715.