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 0xbf31e60b613e85473ac5c8814e23ad2b498f8f1b84670b3a1d643dc93d56ae1c. 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/a0d53539-7fa8-41c6-a054-49520364a2e4.json and https://artists.proofprofile.net/proofs/artist/a0d53539-7fa8-41c6-a054-49520364a2e4.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 0x4d972365379f153cf50f4e8a41f7e83e3b9f7e9ef7a4727ae569480c6841d485. 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/QZZEB2385122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe580a77b3e1da4ab02001b51c9c34e39eedd251eb2bd7bff2be15489beb3f3b6. 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/QZNJX2424732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bac5ac45ac8a759f81a2bbd3e2177264ed7a7a88367a1cfc8c888d27b6685dd. 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/QZTB32430607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019846349ee44b6709f7b1ec46b74e27d174baa0a76dc09f2f27747fcfe72b89. 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/QZNJV2588722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0e2a7f044d796a7dc3e1e51c6a5372cfb7dbd9391e1de831cc26c95151140f1. 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/QZWDW2505280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448fac53c35ecbca9493d413caeab7a93461fc2f63b0f2fee1c0eae9ffb598bb. 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/QZN882584345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148cec7308f86bf83e3e530e38595aa700b70acad4644486ecc61c67669aaf9. 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/QZTPX2454262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc2b9c4b01e72a5b888fcbfe343cac0c90b8d1df80395feb984ae303c227d99. 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/GBRKQ2500972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa061976504af867b8d60699202e4f78eaaafec1582ae31400bd73d25cd6cb16a. 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/QZGLM2573074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544b79ae4f45097ef36aaf202f84ca26e1dd1dd8cdcd05bd2a4d5793c387a7c1. 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/USLZJ2585749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1fdfce9b10ed87bd3cfba0dbe40454e3b088ae4fe0f51607ee96e28c5977323. 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/USLZJ2537227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98c4419c9a2071f14b7d6435ef3d807511a1426d41fe9a56bb499310f4f7873. 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/QM4TW2524939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550da45a7a975207aaf77cb2dad0c483900221850fd4d457f843d9ae4228134. 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/QZWV32494806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca648e2614a87ee8f2f8f3db7299fd97d3056d53a9c17e9623caf8b872dabb7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T18:50:13Z), 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/QZTB32493722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7aab772d6e79db804a98ee9923ad0f1a5e1315a004c937a823ce4b3b53401a. 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/QZRP42471487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4070868b2b34cdd871df8d710b7e9392814ee4ee832e03ef4cf21568aaed2af9. 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/QZRP42469976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e3c5e39bbd17f2621938361029b304a6e01831e779c2cd1f0ecce058807d4b. 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/QZNWQ2449691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb19404cb3721bba66d369e3d17c53b8dd002a7c963326abe892301ce4e4b99. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZNWQ2426812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2bce7ff867f4a530ce32073e6d42de639143ff41c4284a37ec35728b949cd33. 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/QZNWQ2426867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9e4864b5670a08db9edc6e1eb0d915eb693f7db3a3761ce62a61490998b9c6. 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/QZNWQ2426951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08ed94b8489e9373096aedf7e0d9d74a2438d8579eb48762a02909bad090e8cb. 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/TCAFJ2156802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a5cb4cf0305e1a4fa960a678244d5d7a1adc481aa228a68a268ee7e2ac3bd3. 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/TCAFG2070213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f41c0a27a9976ec1ab2369c24e2a9984f774ea329f7830f9790f63febf48d5. 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/QMDA72147384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35531b64caf37088e088437bc3ad5a150ee1d550ddab0e46ad7bbe29a97f27bb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QZMR82200288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41aa8b61aa3d1efae0acac83b81e8e8c3193622ac8bf1a757d05c235f9abada. 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/TCAEW2018420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1da5ddd37746e04b48eca1aeedff404158b74316cbb354226abaebc40fcc3ab. 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/TCAEW2018460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32494f51b40287c9a20ad7fb537f70fb69c12528ea1132df9cf4353ae85386d6. 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/QZTRX2444021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc535135e2fc7f0c230ef50754369bc3bc25188801f280215f078c7d147a9e820. 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/QZHN92149913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf33a56d9ad70a7717f2f34749a189ad9b2a9cf1520610d886c7122c939e0a17. 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/QM4TX2276325.