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 0x26311f29c7f7a962aa8959a2430df27a6f1b7b58d68cc13bdbaf58519d550581. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d8c0bfeb-9f39-4156-9297-db05f27b3708.json and https://artists.proofprofile.net/proofs/artist/d8c0bfeb-9f39-4156-9297-db05f27b3708.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 0x7899aeff290eb2bf2602056d41597304f2b0c509acd82514a2e3260f47691bf2. 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/ZAC012300460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0ac173563f880afa8dcad21d95c82cb6b6e673688dc7964dae52b25ab9616. 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/ZAC012300747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e275b3cded02a7b3d5d6808747e3293d2e0ec8c7d70d9f523d839c98cb0e764. 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/ZAC012201257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad223d00367427d3dc2e09a6169f5a62d5be5690d28a081ac507822a423bd6b4. 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/ZAC012201258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59d5e4e771bb898d168511921726f60e3d117a1b3888496f98734294a5708c6. 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/ZAC012201259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25aae28578eade209c5c2ff95293c5db9f5efbd6c6fdec655840284791beabbf. 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/ZAC012201263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb66f318881f0cb7970a65ab9b0f29cbc76b93bbc8dfb9364ed4512effb59ac41. 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/ZAC012201266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7426434416f8973addb32299d1826d3e0364ab8cda9b8174a3627f12dc5c036. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/ZAC012201270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x276aaacd18a8bdc53f45f3a34488a8f22baa7d01a7366a11c95e4781e70bd1b4. 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/ZAC012201276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a201e40b6c6182294d940922312c807da6010ee85adfd238d930a42b3b6911. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/ZAC012201267.
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 0x4cefebc9ad57bb7207afc2435aaa084baf0b40ab38b0a887f08533a9466d4e2b. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/ZAC012201271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1436d5b7623e82737d030428fd54e9a00767f5f023a0f54cc4a50fe7c9aed194. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ZAC012201273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f7e47e6d180b39b67312dfa40abe98c072203ccfc5579f2a71eff3c0fcd3e4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ZAC012300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x816f80dc19f51f9b3cf1d5b65675ff774b56b321b8a3fadc5b1e11050a6450b8. 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/ZAC012300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb52288d18dc8ce5a0ad30c5226e2761eac372a2d4e60319af6925b7ef96ae1. 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/ZAC012300059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bb432974adbfb45215735fb9ab9bd0c2badda7469a4d46a467151944fb99f0. 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/ZAC012300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf291fc1ec2fa89c88338d2870ee399051afa84e33399bbf3fd42a29d150080. 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/ZAC012300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x174b91e286c383fd176d8dca8362d83ad8f485d21830b0fd43547ff6c19f437b. 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/ZAC012300063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b9ed7df31bd54cc1aea679ad9c1572ac9b59d16f94bcecd1bed0c4c27cf4bb. 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/ZAC012300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1155e02d2ede050eb39d63327d534cd8fe6fc3834fde98a4774afd9c3d2d1219. 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/ZAC012300065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01770098f43a2d8a703dd8673705efa14e822bbaba14477a780713941c40a03. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/ZAC012401495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a94c53039a6b38a69d958df7383c76fc7ebd1fd9e74a60d84cabeca2b13b844. 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/ZAC012401496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5f2c6b6db7c1399a94feb9ab6853acb6f91fcd61e04013dd6aac32bd5eb93d. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/ZAC012401497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3e65bb6ffb9922960d11a230acba9d2c97d6ca3376a7b1a9c84866eaaa8a065. 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/ZAC012201036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d5f1b53c398095a554c47a6ccff841bd5f44ac669fb7280c7d6bc2491add0ed. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/ZAC012201039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bb60c5df271affc74170bd2d59a58e74cdbc47731f8b9802418c383b20897be. 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/ZAC012300143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9f763facd8a7ccada48c65151588f97ecb3edbc598cd9c47f8abd57266bc81. 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/ZAC012201622.