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 0x615844929d7e723f4a6b34fd18e3c5c765ef36b679de9a84e07c84ad0fa05462. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/50502af7-091d-46ab-8c1f-e3aca8e806e6.json and https://artists.proofprofile.net/proofs/artist/50502af7-091d-46ab-8c1f-e3aca8e806e6.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 0xb487946e268dbf79a76639107e8814f591d3a7de6a534eafbd2bf15f850da06b. 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/USUM72008651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe90bc37b5e866b365addd01648be41b015d45239dff1e5ab04f926f23aedb817. 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/USUM72008760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cdaa6c5947bc0d1e6637fecc7bd90ad2d2b3ac3f65ba2af7b5c650980fb167. 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/USUM72008761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f61c903826b98c662837d9886caf026d5c92dc3d4257e972861a8a1606c7017. 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/USUM72008762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9224acd315df09440ff1aad50caef557fb78458d835f591187c800abb75748. 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/USUM72008763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7735508ffb035af6e94c96f4f2d30d5d829ae7f704f04941cefbba2962fac0f. 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/USUM72008764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9c285ddde8b828fec55a3eaec25c61d23ef1ee2bc0c0781c5e5839e039b283. 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/USUM72008771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61c4048c61b9fd3fdb60fb91b7c1130d3a5381346678625adf5024cae6ab724. 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/USUM72008765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831cc90ca819b8e7c9ff5482dbe9e7a5454f60787d87761bd98ebf6797e0dcc6. 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/USUM71913249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77bc4fa7bba6fe0e47e140deee28241dfe4015cd4ed2c5d44c82fc510940f271. 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/USUM72008767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e114be4b05efc2317ff4f543b02f36f70e8323364647da23847354a8eb4a84b. 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/USUM72008768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30edf103c4babed87778bb8ff389e44241d2960df9048103a422e72f1fca26f7. 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/USUM72008769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db07e07ea41d23493159124564ebd37decff8a8383536fb31bd819f96f2c97a. 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/USUM72008770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3592ce74644ecac93517fde1258a6665b47fb8b56f909999012c661f1127c25. 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/USUM71913327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f0fbfaf7ae06df35cc6e8af90b6de7127789b52d6dfc43ba45cb82c7d142f2. 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/USUM71803788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62cf2210630c3f922413943cb55247e509a514d5a8eaea74e30340993b10247. 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/USUM71815028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f40b2e9f162db1928456336ae5d03947142b0d9df9339c8bb34a044341b8e9. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/USUM72008772.
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 0x7c02b6e3510248f66f8ebe03dd6aaad3b8f6fc9e4c119af66050b9a29f5bb5b8. 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/PYA572100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2460115b455998e1c67e620dfd8a62d591a0138a0815ef584552b514263ce7a1. 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/PYB452000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a9e8fd47520757cd17788dc8c4039d10ca9d81ff559e53ed66c8459e27e3e. 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/FR96X1744673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7118ff5fa330afbd94a2a5d4a8f9f09e894252207adca946f8efe4b78b26675. 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/FR96X1749804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa406d26abd7013cc3bf5acf26082ac3937ece1c0955438d2901aadae035d43b. 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/FR96X1749805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c9f9650b4c7fece48e8676470824f6315b7f2bd98bec85206d69489aeedb2. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR96X1749806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7613589935e8cfd62a0475e175f5cae12c57a0fce3ba230e6ebf3e6e801eea9. 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/FR96X1749809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c1c61050018c1bd0b29df476d96615e8db0942eeda2297376bc53083fc191b2. 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/FR96X1749810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e4642a903da52b03629d7ef4efd6ffdacb83c6fa118399e823b7e29c16b713. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FR96X1749811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb24a8037e0076037c9387822ff353a9568cf5f7156ea353ace7960660ec8798a. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/FR96X1749812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e62446d759de8bf5785ce2a2b271949ef29c9bf301068a1dc996b06f0995ece. 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/US2BU1300787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae8bf6e727f21d3375c6760f2ae99896ed8e216f056d27558bec7ebb180bad4. 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/MXUM71502649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc59d2c194aebe774573b63d19427d3b85bd9c9608e1a6da22a89575757343ef. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/USUM70911564.