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 0x1bb21076fc022aa03dadfa847eee7535478f5f33194ab87999407b4586b6886b. 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/3e76406c-0936-47c2-9902-b9596ed325b2.json and https://artists.proofprofile.net/proofs/artist/3e76406c-0936-47c2-9902-b9596ed325b2.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 0x19a14f6266948064b3f9bc7f2226162c9f04155275094925fe41b3533c44bcb0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:23:39Z), 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/QZNWZ2229278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041ac868ff7bbb612bff0825b3c710aaded0368f71992c2a0fc7e8028dcc7422. 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/QZNWZ2229284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66e1e7319e7a8db36fb50ecd4c3b5b256e07373159907181b63d285c5f5924. 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/QZFYZ2351511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x649028da276b06edee14f90bca83f614e18424488619075d2a3fe92c99b33e88. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZES82336068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e7a8b7072470153be4a905976c051b36416f29bfcc66c0dd7944078dfd6e46. 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/QZHNA2353194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1912a130dd108bf75dc85b0552d9d44f85ca6096b641564ecba27b0fd5ae2c0f. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:04:41Z), 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/QZHNA2353197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4460c2a478fe4dd32206e5f31c74ff442d637572bd875fbf84312d588a2068. 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/QZHNA2353198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2da0b515e51b128da7178ce4e30e9cbff1c00ff8e60bbab073420e9cbfa31b3. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:23:01Z), 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/QZHNA2353199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6925d67d377bf3a027ea89ca5d60e0d41305e35c7bc4b15c7fab535bed7afcb. 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/QZTAT2304561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7d92fc9d0d91245a390e807f9281b3d43efdca44bf27ff7210413ded08f6b6. 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/QZTAW2317464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64607cc6a1b90b7d986b7306e74ebecf31370b3b4bb73812289e5f38f960c6d. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:46Z), 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/QZWFR2333223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed469f9208aaf29cd4492288503d4d1a28ed16f13c440efee552432856e0b1fc. 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/QZRP42404250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6165e12d7aaf50fef8bfef176df4e6183ae868a04cfea0a5f9fc865708c6536. 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/QZWFW2448673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f944316033dfdbf780414e2ff0fc014ef53578a040d8caeaad3ec7d889dfcc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZES82535640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6f666c29342d902c99d1a14ce827390614ff99bba414b098252d24b15ac3a7. 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/QZHNC2569912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x700e212a6827865e25222c8a4bc16fd4d0f20c3c57c95e0de2dc09b01f87dc2a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNWT2560181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f798768e96f7d716a58464060d99dbb5fb5eadd42d8fd75c89222a940a78e2. 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/QZPLR2556182.