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 0xe37b1b0bdad17f2f6331a851f2e084487c353954e0a62ce3b5d74e1747e8cb37. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b2e0b542-9a35-4c67-a6f9-f17f480ceef8.json and https://artists.proofprofile.net/proofs/artist/b2e0b542-9a35-4c67-a6f9-f17f480ceef8.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ntombenhle (Letter to My Mother in Heaven)
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 0x557965cd9788a6aead743fcb949b19c341a26c361410b42efefcc2fc5af87729. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBLFP2470992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2733c2f755fa38e285ec5ad78c907c3010c8794029aeaf7396775d41c8048f6b. 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/GBLFP2441583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0ba71ebde8dd8374e6816c120fe39372058715d5bbe70c13c433a5a0345648. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/GBLFP2470987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4de43ee47e54d43ba2fb3e33bc57b3bc86dfa55cc8329a1733bc801fb44031. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX3Q92464655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcdb82a92fc827264309b412d3b5c85cd61ab595ada8253c940454dea5f45ac. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX3Q92472507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe19f85b325bfaf766b78f6b62517f9a3dbbe9c754a6b83682bc866e77496cfc3. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/UKXN22481265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147b3e669913d7e28dc18d0eeb9af33a8eadaa7a341a2019a13ffd0c8b971cc5. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/GBMA22466463.
The Silent Witness - a Syndicate's Trace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4720d5ced31f40ae5390de0bea17abe6066ea34232f656b517b74f39be1b64a9. 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/GBMA22363427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2b2ebc73b31ee768afdc217c78c3bc8fc3d4cafb967cb1cd8d08631fdd3657. 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/UKXN21995469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6e5e44ea6668439629dc14e85a6c108708bec2e35848ae7f7b42fcead6c739. 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/GX53U2420677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8ff711170d40bcd11974a03e55e9c5934cd1fcc875ff7131d9dbd816dd4d7f. 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/GXF9Q2422815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e438d6d120ef8bc44d9b40ca30ac4ad1500869d13339109ef4b7df7889d4600. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GXF9Q2422817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cf810607f5ce981f732977d4179d8c21eb65885cb431c906608afe2b5746ef. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/GX3Q92594297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edb0a2946c547b7d5b65f3b13088f6d46244b61aa767b7d8fd46f672fa2d8e8. 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/GBLFP2568272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x467bc0751a99ea1fcc5c1147f4e4e1d16df65d609c491fe861f4ab2f0ac0fa22. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/GBLFP2568275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f91a4090cf2bb7e275629ebeb8d985be9e03128ea50eb8a80b15d1825d5cb9b. 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/GBLFP2568286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b35973dd6e981712ebd2d8882e548eb597a0a526f671cf77e3d0771b95cacd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/GBLFP2568287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c23350be19671ce177020b7244741d2e866b62938717f33028f73a96ce0637a. 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/GBLFP2568282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dadc6fd9c987211c7e44791b7ebceb39a8c4837983e0ed759e1008cd85eec9b. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/GBLFP2568276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e51faeba5fc9e06072cf797e3e7ed621a7989f8f9cd8ba3e40dea98ae4cc601. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/GBLFP2568277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0906eeb1ad97b22a3e5341f02db4bb6b22cafa4f8056c0f87fdde4a05f7357f. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GXH2J2577748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb370904125bed5a1b51c008852c6d0eb7e60a6f2479c0bfa343d55003dbb11f9. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GXH2J2577753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6cdcaa79625963b16d1222d88a8468b9d738f3c95b24b0a19561ad00efe72f4. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GXHND2573230.