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 0xafbb14deb4a458b337a4927b9bf1a5cc70404dcae9cabb84d2f04156eff1c390. 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/ffcdb3c2-6cfc-4da0-8598-21e5d1ad5a9a.json and https://artists.proofprofile.net/proofs/artist/ffcdb3c2-6cfc-4da0-8598-21e5d1ad5a9a.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 0x98d1a107d11e34a9d6f1e933468c2d4661ffae6c3a1b49e5c3acfb45d7e26580. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/FRX202466965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43cf033b4c9f97546b6e6fdc88c20bce232b9da150df83b599ae69e0388374ab. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DGA052411922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072b62e7a03de36469b8d27bf5406bcd4253a61a127a09544672d25ebc9156d0. 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/DGA062403575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fb5e9bf0bb10717fe6f83702804cf7872ac7be8b6294d3f8f9af0b59ee3f4d. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/DGA062420817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73fea297db800086e56927152199537854f53b192e18488f49274d9d836b0d80. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/DGA062403610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6839da04b0dd601e78ae4005a15296bfbc452af4bfff29c5a0d186ae134bb43. 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/DGA062420818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d8536a78ed5f9ad6aff41bde95b0cfc5d5be55146fb91129fdfba93227122e. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/DGA0M2467106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4964ec18582ad49cb7d28c883c35bf4b880f844673d86aeea3bbcf48a9f9f6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/DGA0L2495122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb76566a0ad815bab0cb543da27bd36de5e0b6da37c99c5b188e4fd00aa5ff81f. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DGA0P2423721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af0ebe40d9a98030729dddb30e07b013287dab1154ab4cc56dfaddf22192e71. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/DGA0L2459180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72e09d8abc11e033bb648007ea1b3638142d97620fcf4f777a57619739940c5. 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/DGA0S2424567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fe11baaaaed50694ec8758dd7a8b3c6e10533390523481d60b250b4582ad56. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/FR10S2501573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa21d7418202953788892d6396b8b7793c67a26e5d3d1484e441e81c267d9c9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/FR10S2537420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e5b9c48f45d84f58afaf76e7d11871173804f934a63c4deacc316c7d4ad418a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/FR10S2501776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae093a4d64a8c480a73bd9f76ec1a4ce6d00f10c87252706a12ff06b77062d6d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/FR10S2585153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8268488f7b75dc0b77d27468f1ccdce24f166e3a1574a2b40217cc15399d4f1a. 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/FR96X2507916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b84a1163dfb61e8190dfd298066ef5d17ac035f9677610f4a6c53a891a8ac3. 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/FR96X2509694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b4e1410a7bf69f5bb230b87eab75fc0b56586b3cb2e5889c8542a43d3c67ff. 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/FRX282508985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17ed1fe2580affe529579f892674549e0d907b8ba041170ac8c8be37375248c4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/FRX282509681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e358d54d0d29a7bcc1be016a9b09efcae45deb553d6bb83a161e639bd49fda. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FRX872544633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd5fe1b1094452986bf896a810992967b2703a025769162ba4754d69f077b77. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/FRX872592671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b479558dcb0083edabb7b0d09dbdf32b1b07783bbf77b316303ab1a94d986b7. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DGA052505498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1df23b276e196ad374e7abe866cef64ae4cbb9547f7f6e0a364867b8e061dd. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DGA052511121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229d40ec551257858aef9fec5eb704ab7be87977cd3a814288da667717ac751a. 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/DGA062539773.