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 0x166ee57a0d0d201e2190e581c5866375a76a3a2585763f3ce4c1ed6b0e2a5af8. 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/97e7c5dd-8033-4a2f-a5fd-c888a68fdb64.json and https://artists.proofprofile.net/proofs/artist/97e7c5dd-8033-4a2f-a5fd-c888a68fdb64.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 0x48322a674296206188958ff6440fb03b1e7bc27198c2a76323450d242ac78056. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADZ1871377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49921911980a39b6015c94cc7a51f522e6b382ee669b468d071c25963a5f7fad. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCADZ1871378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626643250eb50fe9e2096187342bc1025ac118a6022a1d1c0b3491b2bc557794. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCADZ1871381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda8eb9113e6b8605d518e778f45da8c37366e55cfa3dfb457d0d91711af74e3. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCADZ1871385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f3cd798a222f4a5aea5ea2fa5bbb3890215757096784f78a8919725c6be75fb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADZ1872130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea00985d1e61b53b7d3d7bb1d1ec02ff613d9be72dee5b1137e1735824e4e389. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/TCADZ1872134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77ed9d880aa39e5032bcf0ab0bfc82a7568a26655e03e2c39e4d3565318f2bf. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCADZ1872138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291cf26f2f1bd27db78afe7c6052602e85c9436a29e495828c53164f355f8c38. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCADZ1872142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df6beb5f96afa259b44dcbf30c56f38451525c2e314dcbc7d2d07b9eb1ee77. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCADZ1872150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0782ac1de042e6cfeddc8550bb01813d0e3ff3dd262c24c363a2c3cd62faf63f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADZ1872170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b361e007b723fcc62538f70ed191657d51638fd022cba81d4646889b6bf97a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:05:13Z), 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/TCADZ1872172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1978dcb74c630097b42fb3f909095d8e58355acb37ec3122077f05a82bc8e7f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCADZ1872173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x454c5390fbc3394259c28563ddc9db29bb7df3dac463a8c57f8160890e641108. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T16:57:11Z), 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/TCADZ1872180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683254559c6668d22c84d0281975c11a2a87da3d2ac424a793de02f533b23316. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAFY2146143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ec6b2b92362babbfdeb04e4fbc17aee0f782de7a8ca92553c2ddadc444d64e. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAFY2146161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37103aad3f99b58fd23ea50c8d523ea311de074dda964ca2769907085fa9acf2. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAFY2146185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4aef05b765a3dd69402af92e4172d847c7873333eee4b99a57a231617f5646. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:20:13Z), 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/TCAFY2146194.