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 0xd35a8d75f189f172b13e64878cc3d05ce4478626a16424dfa2eea9e0c67d4c17. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4eaa7a4-dc35-4520-87ad-852fce2eb698.json and https://artists.proofprofile.net/proofs/artist/c4eaa7a4-dc35-4520-87ad-852fce2eb698.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 0x6f172920b3d6e52f8551bb60f4503d4bd0e88c806de9c330cbb5876a43dbde7a. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU1872303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5acb259f2f283bfdccb5c63e0a32cdb2bd1ec970b05f2ecd4447e1ce865d8c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU1872304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40e445a364c2b77f825e475f49c82228ce887f2008336d2b6ac15986865d0b5b. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBSMU1872305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebace02dba1f56116033cca55f927daa98897f4721f161ec78d51ab7583536b7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU1872306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3194ff19df009168b25405e35d461cdecdda4b0b6381d54bf7b30934d86860d0. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU1872308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66495077b32aaddd4fb4348ec0dba043ca822b12ba049d1dd71160b6528c5ba. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/GBSMU1872309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cad25bb55b0bce9b160f0d11eb05e1c369eb72fa12d00137dbaccd1df6ce65a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBSMU1872312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa433d76199e18643fe71126beec6bb757309e7c48616dc06dc8751cfecf48966. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:23:49Z), 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/GBSMU1872311.
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 0x138c429f23f19bbe1a566b3fcb29b838ee8200dab773725bf658a4844d842594. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/GBSMU1872307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8219e7a47dea84e9a9e2fa2cd4767eef1a47cfb756d9a6dc2adfbeb2750cdf5. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBSMU1872310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59484cd011b82184dbd21fbda7b116fb97a5c5c754dcc5a6bd872eb8a1fa424e. 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/GBSMU1416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72a6f07338c94c7469b42bd81e193f445e0ed5fd889034b0f75debe8d7752e1d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBSMU1416274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f6a1b76ca06d5cb9b5404347d31debd6425d4870a08780df3352550dd13e10a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/GBSMU1416272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa718d8fa711def5db08e5190ebb527f7308ae806e6c487848115b8e918716d5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBSMU4409225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ea95d5fd3843bd9894398aa915ff33a0fafb91ae25e5dd467b6d2e3456fd216. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBSMU4409226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5820ca02a106bf9b36771416eefe36cfd68d915c0493eae19c71c8c2f27cd581. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU4409227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e458b95a9bf90809a556cb1619851eb3e881200bbf3a0905a7d33b86400e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBSMU4409228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac629259230b1f333ca274bf8fa83aa3275f37d9703f7c37bf5160b7ba3f1b44. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU4409229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c14f988a27eba49f84e1b4c37f51d16176cf9add8f1c4e6834bdd0c822f17b0. 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/GBSMU2264758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d97a09e2836ba53b137670427c1260537c322554f4114432326aae83cb25ac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBSMU2264759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ee175242daccd8719d833f68ef390d5b883a6710c0d6c4eaa74dd3c6068534. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU2264760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572e5792d7e976bda67b43717ac3d3caf10f9dad41531c1fae79f0cc7c165019. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:14Z), 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/GBSMU2264761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffc818249ac7543e3fab624dd039b80986748e1622fef0c50d054ae0a65423d. 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/GBSMU1416257.