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 0xa40b23a327b221edc97b857e06c3f15945116b308569d02bd0acb4c6a1f81337. 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/8ce802f8-60f7-4dbf-a87c-f2acb319ac8f.json and https://artists.proofprofile.net/proofs/artist/8ce802f8-60f7-4dbf-a87c-f2acb319ac8f.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 0x25f2c6c4a66041a76e23a9f607459e426a87cda40b4fe63201fc23f2a2288549. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QMDA71449031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca030d0e45012fca3048eb75c4ab9ba940454bc814f05d4c5b1c1064bf4ecd59. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QMDA71449033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7043a82d96da905d4ca3274fce42edde33e67dc757967304102ba58e7b744f57. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:04:45Z), 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/QMDA71449036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5904a8afbe8c7333a7c3ec5f7203f61380dfe8db674208e23658d51f4139f33c. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QMDA71449037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74aa92ec382d6bae535770dabbe717d25da205de1cd4ba9366204c6c7620d84. 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/QMDA71449038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2418811b2aac2fd5355380475ca137bfa486aba404a306644d5910f0c4c688d6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2Z1510339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbafb00181f4e42bc153988ed7e63d64df60cd7cd009e19b42a359b4dea407296. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:47:12Z), 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/USA2Z1510340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb776508d9d26d93a696a297dbbd13718ab8210b4a63fbf296fb8ac087d35d0f1. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USA2Z1510343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de4f5883dd2d27814b64913cdf87e87d37e48f99ba7c02bd4982b71231cd0a1. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USA2Z1510347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1db0565f61be281a12e11005dc0434c950bf55949b7f26e8d3b566194c36111f. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/USA2Z1510348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bac2316698bf774b0f5fc915e1e8372cb645ac0edac096524e875ce3b4fefc. 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/USA2Z1510349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67d215f480e6deead36c7dae4d1c6da8239b003af0d94ce06c74d2f1db12102. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:49:25Z), 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/USA2Z1510351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3ce42e995563c663b3476def2d2b5290f5875eea0d72d291d9006276b678e0. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USA2Z1510352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706fe2209537a5b4549df3b52846d6a0f7762a1d2689640a879517c6885cd950. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USA2Z1710152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31521e1d1aff6f2f54617d607198b0af2d8d96e4c769706ed704965668c9db51. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA2Z1710154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff68fd575ecc2960119e777cbec92a45255a030ff98d249e97a271b17471bed2. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/USA2Z1710159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d8f819c0e9bafa4ee961cf2aaa5f11ff662affc2b7e416a958a8641c6ad13dd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USA2Z1710160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6deae20b508fcb567f6aad20f106cf3798c11d6da74f1efd893b038d222af33d. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:51:25Z), 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/USA2Z1710163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec409d64d94855e963727cc9515e9059da252d97d0576e6caf24b9c5de9b18e. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:46:42Z), 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/USA2Z2000234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7526d582ee80f6d084d4e69ce27298064263870bcbb92158d0586e850fbfc1f6. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USA2Z2000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76df653f4a1a7074a28e273193340e3ab6c48c660f2edb750eac8d75b5e5c4f2. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/USA2Z2000237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35573afa1aebe87d50346f42bc7ae83f9e0d7b332ad9cf867e095e4ae994f152. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USA2Z2000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccbacdb36d01041dd8e11fdb3bf6b6fc89d05a04015935d62f5c8b5fef5bbdc0. 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/USA2Z2000241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe4f2bd808192a2c1e9363ddab83976637a6fd235e69c93c5ee2c87e160d852. 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/USA2Z2000242.