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 0x96f838dd80de3c4271e9570ce1f15c3d20e6379ef5215346465c1d54fb014390. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/772a8fc4-7ac4-4572-afb9-9cb46a0e533a.json and https://artists.proofprofile.net/proofs/artist/772a8fc4-7ac4-4572-afb9-9cb46a0e533a.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 0xbd8ad706c35633a7659dfec63c016b5df4e57a68b71f0152648eb640357c349a. Chain 2 (Bitcoin): anchored in block 958860 (2026-07-20T09:58:28Z), 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/GBMA22531836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786492fec62f6153087fb9ea887bb1083d40698cd31b5dbdbc9cdb168d9c52d9. 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/GBMA22531837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b5b2a1798c5e9a6c451c3d1e76b5b72736a1fd7567f1f5a91b767c1e955912. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T08:42:04Z), 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/GBMA22531841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7819db6242770f55376aa3b74f61ad57a9e42de66bba59287d33b09d0cfecd86. 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/GBMA22531842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3495524f7597afc95415b955763d4c27c89730c7d452fbb3fe0030c605ccac7. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/GBMA22531844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7087c8f64b1aec8c90a4913e6c27b247bb5b1b78a5c4dbf6e9b88a6d490152f1. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GBMA22531845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e4d4d0b15f63cdf01a2a8c8181cd2e52a6ae235e19c996e0a63a5bde9478d2. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2507512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029ab3c485082e05813621dcab64d37dfff0a0de325e6f6611c036398f234944. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2507513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01013ff7cfbf2cd97c1decac4c94f22e411bb41aef30f8b4fdea893921bd55e2. 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/ES75E2507514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f9cc97fd966761a9575ffb5388f8bd6ccbcd7d912556ad9baf1c8081974d026. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2507515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8108773e65245c1f5f82a097a7b226e68c827d7b7f4b0e55e15963d72aebd. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES75E2507516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fa9a3b6407f4ec6bac9cff3ac5ddc111a27c4df59cf79a051172b465eb104e. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/ES75E2507517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7039c60e8c055af9fa679956bb1be80e82dd5c5769c9d881b7f8b680b1b3ef7a. 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/ES75E2507518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf247c81ec8f7498f53fd0b151671201a1871a8aa574774cbecc1f94962d97bb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES75E2507519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e25a030dcd331a2f1cd3ddc717b1c5277e2b173069798ed08e7ce8511e367c. 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/ES75E2507520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71009a60696fa4d50c4f4f606c7cae9d24b3417814c4663e9bbe5fdbe84f0790. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ES75E2507521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd9ef03dccc76a59389a48ef18ca9b175d02180d39a664565b816d7540efd76. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES75E2507522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f08b76e82144ba2db649b5d49334e72431774c11791e2aa9a0e0f5024e47cf. 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/ES75E2507523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea57f7237679ed2c369e61710e2835ad253d1f0e63e74fb096107695e7e0d8b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/ES75E2507524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba10cfb9ab48a274328c6f0703a2c3e090695af8a752519952928daf534ea6. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/ES75E2507525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f8d06f7e1d2d5fd834df1de31c70a99017176e1b9fafae0d624c2478a39bfe. 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/ES75E2507526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73246c16d463ca2206cc652b05bcc96e65941362479a2861e235c078aaf55d12. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES75E2507527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3563c0bd272259b96312c6b1c2dfd3c8631722c4ff6a073844abf46db404ac1f. 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/ES75E2507528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7711f6764ef38aba6171f611b68395b1ef7ef2904609e99ca5d29cebb3cec09d. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ES75E2507529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac2c22b6952a3a8477cb24e884dd9a3c89c69062101a290bf3227254fe583e9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ES75E2507530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x488848db66923ace31a8c22c9a401a2a1b1de24ce2dce5557e84125bc6092191. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ES75E2507531.