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 0x0fe45d05861ab36b2ec195c8fe358ddd57f7375d059aa4c9b6e30e262247ea03. 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/5e588718-55d2-4c86-b486-f6cc8baa4e03.json and https://artists.proofprofile.net/proofs/artist/5e588718-55d2-4c86-b486-f6cc8baa4e03.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 0x6fe68b45f1aa741c0b018bb3272e5834a91dc118d0fe8da56e14ddc134059f77. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/FR2X41788419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03dd8d9d442e58743f614901c71f7db5a700fdad86e63742c64718d7e34e5b8. 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/FRX201777192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6394430fe1f3edcf9019b1880315de89b8e82ac5991073613fea0dd23da1b3. 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/FRX201777194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe780d363190faa6cc7a903d94fa59440536e76bc8902f48d67031df94d86cd42. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/FRX201777195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d3892dddd8e24a06328ade985ae62b9a06c8eacd1df42fa7f034fa597f1330. 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/FRX201777197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38569647690e572980051ff22dd617eeb7b887cd16d2df13f56238ffa2a7c314. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FRX201777198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c5c0548697a11aad4b3c101ba289b531db39cb7e286781f8698785d25121f74. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX201777199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301955c4b84442fbb7ddc68b6ca518baf5c0a4487e354ce0e45197d7adce7cd6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/FRX201777201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa8888251c791fac4b9e321204997e0513ac5e1e39fa1870916f900c4ca73f6. 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/FRX201777203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edcdf6c9b26e33b10884b02eac08f8e65ed935166a17a12c26a7a32b0acdaf7. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/FRX201777206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651830fb23f7d99ddb469d70b8635d6acec5e1d566965236e98a1bc0d02a5f39. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/FR10S1958530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c3ad347207ff74ec56e6092d7229d961c501124a57782a5c5af071759ec953d. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/CHUM72000190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5b7ddd2480189798d18ad5da155e73b290dabcae89d44d22deb6c917c0fa6b. 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/CHUM72100067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f9594659b47ae8e58cbd7c8b75d04acd8e7dd23c7f11470c7cccdf6637e88d. 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/CHUM72100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f9594659b47ae8e58cbd7c8b75d04acd8e7dd23c7f11470c7cccdf6637e88d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CHUM72100237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16dd332bd873cce94a080cce37b9cac7bb07053c2f3867f6a10edb783b48fa78. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/FRX872272226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97aea2849bc8328ef9c4039fcbe969579778c2d97640ddb47586d2d94e48d967. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/CH8352306105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d991aa0e4cfea6c3c275787d12411c78c2fb9545fc98525375dd93ac43d82f. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/FRX872307224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa301a3b72fd55a53a90a8428fa0674694441bcceb3188389179960f927b55838. 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/FR9DT2400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a6f4e45dfcef8f21d86d85f7d6cf38105952bf8a0ec95347617d3f3843ad403. 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/FR9W12337121.