thumb|alt=Christos Rafalides holding his 'Vic Firth' M37 signature mallets|Christos Rafalides holding his 'Vic Firth' M37 signature mallets alt=Live at the Olympia Theater in Athens, GR|thumb|Live at
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 0x0aeb108861e0723a414a508337c9883e967fd1ff3d616ae92dcc137cd82fb8c8. Chain 2 (Bitcoin): anchored in block 954659 (2026-06-21T06:14:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dc0369b3-da92-4cd7-b405-704ffcbfbaaa.json and https://artists.proofprofile.net/proofs/artist/dc0369b3-da92-4cd7-b405-704ffcbfbaaa.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 0x4dba723a6ea1812b54831414415b3fed7f4e8c47e2bb40e7c491f23bc6aa6988. 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/USL4Q2177155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe67cae963bbe10013381fdeb7215b3d0761cc478533c58bcf27b3871d012223. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USRUP2300011.
Van Gogh by Numbers (Vibes / Marimba Duo)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd786362148413b8211d6bef99970f1cf02c4fdf47af9fa6175d61c97d3734f36. 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/GRHV11900146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67db1ba3193734edfda409d0199816b069ded090845447922dc536bf4f3d893b. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GRHV11900147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cd1b9bc32ffe261b7514220e660bfa1eee66db53da0fd020e123b957a11dae. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GRHV11900148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b679055acdd82029199679cca426165807c83235de85947ef81d55c883bd0d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GRHV11900144.
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 0x0e266f4b1a105d6c48db482c406c0616d669dcff42fbd2c661a939eeed36becb. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GRHV11900145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1b6e7d01c2061d84166582919bb52acccfc4ec8edfb58ff62efdd674fc5cb8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/GRHV11900149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828f0e4d1c75ff5827a49d6fa311adcfa353a720aec20497f9b1a4d344077f88. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GRHV11900152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e32e4457b009533e40c26e2421e21428bdd4ac7cf0c255102297d4dc8dcb5a. 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/USXXS2400040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29a2a9f97e0c53562d3e7dd5ef58c69ff2e752e34e4cf07f038f64b765f19ae. 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/USXXS2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b7531df53b7abc6e6ba9d88eae0eff204acc9f250eb61c0c930ec069cfbcae. 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/USXXS2400042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72f277957114d8608212cd720a6d3fa33240c5e10869bdb5ae163595f4005e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USXXS2400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c731f554db009ea2fd3dbde0418827384eb5e3ea07e0befedb77f02efda279. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-21T23:19:06Z), 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/USXXS2400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5826d5daf45f53c9beef79a7ed09b930a5dc10a0eea69b5dd16e1f9a74d6096. 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/USXXS2400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ad453f65c7dd075a31d3a6541c7d8e113a25865259dc3ab291272cac6bb221. 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/USXXS2400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70381dfe580b3147448f25245e526217e56a24aade2d2c946610b3bbfcd2e222. 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/USXXS2400069.