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 0x472a81d4fd483193859b73fc57f5f9f48b95f7e78e9a21b188af89bf70b8ab39. 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/18c57f0e-bc76-49df-942b-8d47cab32c58.json and https://artists.proofprofile.net/proofs/artist/18c57f0e-bc76-49df-942b-8d47cab32c58.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 0xaa0d0e8ddaadf06b052add369a3179132518a9e31d5e67412cf3a2479e381348. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ZA7HM1800024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33507b55dc98021e12cf2d66a5c230810c35f15ac88c6295fc3427dcad67a047. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/ZA7HM1800034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67676696abe304e3758ecf929d56b8f22cbf6fcc0a2245810bfb4aa875e77e6b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ZA7HM1800028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548f355e57b07181f5a86ea4b9d03acad09c7430a69e79ef564b7ff67679948. 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/ZA7HM1800029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bcc372794f9cc2f79344781a55ddc0122a322eaef5e216c2080c587a3576300. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ZA7HM1800027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a5a88df0987d22fb28bea1dffdf166b4571b9cd7434633df1d42bdd861d0a7. 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/ZA7HM1800031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6896be875c24604542ca27fc3c4c65f132934814bb38f3f215ae7d99ea9c2a. 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/ZA7HM2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cab925b0ae2d0d3478aba4692a2182d44d4ea96ca66ff48f0500765d3157e7. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T02:37:39Z), 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/ZA7HM2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a04a1e6cf30e8463b600aefd622d2d31ad1edfde33e1999a1e37cb1406d8ae. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/ZA7HM2000054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac937a5825c49917f630a4bcc77c1dc5e1dd986e43e787a18336303f5fb5fdc. 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/ZA7HM2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35205dff2bcaa18a0150237a462316b7d9c65c0cf4163b9e2683f990b9cf11b2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ZA7HM2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c939e20af715994b87c8c04095fbc0be3261ce677ea5f36d778a02a1f59a61. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/ZA7HM2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3cab925b0ae2d0d3478aba4692a2182d44d4ea96ca66ff48f0500765d3157e7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ZA7HM2000063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004c0dd93a64b9e06a6402dfbc38f196ee2882f06f3746f7984f0ff39e109df6. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZA7HM2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6510daf45ba79c804143009cdd01abba58071eea091cc829952b75d21b440643. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/ZA7HM2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7827fd98bda5563649e368929b3b3f0fae455c4c1e1f8b256c07e66b24cc37e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ZA7HM2000066.