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 0xe3168bebc548017834d02f5ebb459818e9608452d367bbec66ec660024873efb. 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/370d5308-a8f4-463a-b9b3-8ea004e0abd1.json and https://artists.proofprofile.net/proofs/artist/370d5308-a8f4-463a-b9b3-8ea004e0abd1.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 0x26839aa9c33b6a5c64c65c5fa4bc2a49d6cf6a4b418119f0bf36173453fb39c3. 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/QZANL1766895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047300e5a599194674fc427afb0a69ddccfcae3df6672abffc8dd1f0b177a12. 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/QZES51885738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a3f6cf4f7180ddb4c0273043dbbbcff284ad9f12b85c8f1b825f7df2108cae. 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/ITFRN1800130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb8b1555f2ba332566d7b15412f9670cbc4b8f56b5d4d64435aa45e0d6c3ab4. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITFRN1800131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ef984d24e386db53bea84a4e4c0bf7038fac807bff713667d0d0b452bbb749. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/ITFRN1800132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf036bd099093576e40a7deadf09d9b560740b1eeef6a0b976bcfacb221f28e84. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/ITFRN1800133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e32da4c3939d61bc49dc53f5084bc5e9516e5505947edb80a294578ad0d86. 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/ITFRN1800137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e57ecd4735b2660f59c2abc5e0d776ddd68d8b5b68dbf296b610632330e71c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZHNA2046278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e85fb6addfefb44d53ffda18bb318781403d7171dce23e2e52079311a0295c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZHNA2062401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f6279a13039f0ecb03f4a11931c147b3028c3ec527d23b4ee0faef382cba92. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZHNA2062402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed71c447393eb339bbf2e53eb8e0759de868c8d6fa3c5dc9d5222bdaae707c9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHNA2062403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193fa9c546e6608a1c31041a89142ea8a31afd3a4d96ea6e83e022f125bca6b4. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZHNA2062404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb05482df8f331963c9d192cb9c15f21ae142210695d496e553e9bf0f2d113216. 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/QZFZ72234517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a911260c8e3219e5d53d0455dd6f9c830583feee8e73c631aca3695cda297a. 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/QZHN72386870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad355bcb3758d145d3f91d40a5496e4e6565cdb73e9ed6e953a80948a08e36d9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6F2301006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44009b1cd1d55b08802f73744de453e84f9e28ce698b110f7b0bd2c8e15a4da0. 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/ITFRN1800254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc72532a75b8b064f3c3d0dd93f39efc5f1639871d4ac38c9141b2ab2341d6fe. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZWFE2393492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x143caf54664c970ba161cab3e2a3e91bc38d333e3351016840a3e54e0842a5c6. 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/QZWFE2393494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3821592a7525b3498dbef93936195361b62b2ad4d77caa0dfc1a8cc75fea13. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZTB82319715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89cfbfbec4a2e3439ce95e8441e8dfe830a8b3732a2fb2129e2b2de51bf7ec4. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QZWFE2393496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf340a30b847b4e24222b561109d4d35d3020e7650c08f0d8d350ccbf9d3444f2. 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/QZWFE2393497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678a740f87a8e99a1ad661cc9596a4cc8f8cbb8d3f82630fb9e373d55fad9a2b. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFE2393498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66f89d2c4176732ae0565e05b1d169e0e9dd2e609a4d23f2145ae7ca69c1cd5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZWFE2393499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2173b5b131b55daf8be8ece8f61f1c9236ee284cbd69ac5d6bd0cb6223204bb2. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/ITFRN1800252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4704376b56ae61f225e0c8dc735d95642f1c9bf30c4eae5906b522cfabc9b01b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:09:54Z), 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/ITFRN1800253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5844ee55aa4a28eed4551ce86a98041c92c6d682b9cf140955ccad665f172220. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITFRN1800256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe746637e8a8a42ff92cb7a855238e428e1420ead55b885af71f9a1fd09e82. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ITFRN1800258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72abfdf613fde60dbb6af71a34948aa7e370561296bf377e288bf828655b6d36. 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/ITFRN1800261.