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 0x90efdb611d949ee8b1d6bee6c019de1f195ba29fd963f3ec6f992d10f9ac7f6a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39253a79-4da2-438b-ab65-abd1e2e028eb.json and https://artists.proofprofile.net/proofs/artist/39253a79-4da2-438b-ab65-abd1e2e028eb.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 0x58ed0b0f6f19482ed59f1e733baacbb49740b255374d2b023d31cce128865e3e. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES52545424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2cb8ec80248ec9cd18869852a78b0b0d9c877f757d0b99fadcf2e16d5d2f291. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52545425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81d3346d9cb75fac55127e36b9ceb268b456b53a91021067414480a5db7b969. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES52545426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8411149ecdca3f6eb1661708a7aac8d2193e5340049f638807eeaab57a15d2c0. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES52545427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9a4be676f057d64df795be288cd8381e12024e0f2f13402747c3ddcce3db474. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZES52545428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22e6ccf9b767740f76c07f729cc82544dc8c05a904801cdad2e918d6db7f1878. 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/QZES52545429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623eb21070a288ec3cbdc08e1ef3dddda52317245ecd8e1e445258b6dd5ddaa5. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52545430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f29123f1e3554d9dd9e321199c7aeef8218139974d418fadc6e92991ea1552. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZES52545431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf62842cfa83a3c11252b132cf64202349ef1d057926f0b52b8cf3c941bfbd06. 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/QZES52545432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b98a19bff9a87cc375d50edba6d163ea4a5960846f971bcb99f00ef90def7c. 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/QZES52545433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35758fea5bc8b2ec736680c972416df652661ed1eeb8cd1d981a03f264a16adb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZES52545434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefadad018b5a5f90bfce9ddbc8794abad5f449f81879edf8a148a8fa286babd. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QZES52545435.