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 0x6f29397fcf7904c1961b03ac852510ae9e477d54fcb9b09bd750a6eb1ba83fcf. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e2dc5548-5311-40a0-9626-fe30f7b07c80.json and https://artists.proofprofile.net/proofs/artist/e2dc5548-5311-40a0-9626-fe30f7b07c80.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 0x9ef72258978499d87c79197d817a73bd6cef8afbe81799d645d15011d9bbdaaa. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARQIW2504191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0218b0abc41a4fe769416f2a72d0cc629ef686dbd89f1b6c4ee4a9890ce1d13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARQIW2504193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29682fb58f6469b17d277b6fdad1f7cb0b662facfb7b89b67ffe3edf6a968315. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:55:55Z), 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/ARQIW2504195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb663787c495e275534624f3aac53305ae2161352792ab3fb5e1f475265e3083a. 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/ARQIW2504192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e846426e3175086f649ee4f2c8186c59c23482164c7679ab8294dc933056ef. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ARQIW2504197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff3de28275bf593c2e51eb61c721f740b10e56c941975f90073a9b5b07fa8326. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ARQIW2504200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9ca4bde312116e03b78e1261afd4cfeb1093716798b66e7968615fb30ba1cc. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/ARQIW2504198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973dd0c8f39e8a165ce8bb2ed82445a1a5911d1c7501a6427977a0b325f7f580. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARQIW2504190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4332f6fe526f763387ceefb47be76837c85f99122185220875a1055719d4853b. 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/ARQIW2504185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ddb53b0dd76c97c4bff0e0377e60e3ce0937127c775f64a71ec55c3f1c4453. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/ARQIW2504188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee8198748b36e515b193b4d47c715d5b57754f7e30f026f0744a8c1d076bcd3. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ARQIW2504187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaea9e6c36df4f780f44d49934be55cb7617939e1bb5a59521b53f50f1fffd1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARQIW2504194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664aca8a034218c50961e88382bddc59b9a4f8f521326fb0ee45cfd088e43148. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ARQIW2504199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5011f819f831befd4bb7d01e7d2cd362dab1465a2b72a49f698b751a288340f. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:51:49Z), 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/ARQIW2504201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9852ad7bef64b7d7c51fb6edf220d9019843b6c682652be8aef692272e9b210c. 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/ARQIW2504186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7a6741e8d9346be481b4ba9b21fd2fffed62f8918a13594d29ed954a5ff685. 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/ARQIW2504196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc35be76e8cd58ab7dee93e27a1e80bcf8e8f6ff26adbcccbbb94d677b1697bf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ARQIW2504184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60c9341363ff215fdef61365270ba83203addeb6550cb1ed7efce2ae24b06d3. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:43:08Z), 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/ARQIW2504189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9445ed7b5d23e11797cff26f0e322ce243ead323ecc0003a7890e36156641ddb. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARQIW2504202.