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 0x2fc84ca87f9f81cbd4a1fcea57ad093aff0308320b863f29d2ba91fa72592d3b. 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/f1a0345c-7bff-49b5-9d89-1e5e3ecb9dd0.json and https://artists.proofprofile.net/proofs/artist/f1a0345c-7bff-49b5-9d89-1e5e3ecb9dd0.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 0x74b0e7964a7553172d3e8f1a844450a0033e99cc5cd792bf8828236918b302d0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB2263376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094a10bb3b6c4cd7102a22f25f582c701b1a14f1ccc1c89e960d1ae0f53a8cd4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLM2360762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ac940745ebcc76fc0db6ff7011ab19d94af0376179619fdebfc056f6f7d11a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZGLS2245293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46d0c701033ea0f8804cc15984c5c03388e816c61bccdce9f6ee92216e5d802. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BC96H2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08159eaceb94d6fc59a83c51b45f52dae58475395643b3754f1d7bbf07b3e52a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BC96H2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1cbdce4d258a932559e6f07f3f7ca34e54e7a46a382f9df0f7426e2f9b78e9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZW9L2253662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38abbd0443d8a4f4003ba944bac4cc2a916247df0299b71c9d93b56d0d9080. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SE6I31944092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f75b367d38756e22b23b5ae7c8ad2702258a78323f811a08bf2c8747974b134. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BXIV82307444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91225374e6979aca9667d8452631d63d014bd97a7302aa3616f20ee0cbb66d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZW9K2200137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9d3aad3ea51a3c12eb8b13257dc2974a055eaf87600eacdf47288d8bfbad04. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJX2275812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1789276fafc4ee4bc32577b1a5ae8664daf91dfe0817adfe63eb440b0c9050d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNJX2235869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64758209423a359962b272b2a94974a9def67e8f02fe0d59c464496fab82703. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2208893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9050c91d22d64ae983577525281d8c1d6abf76495149ad18adf17c72aa580d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2219072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82564d8e43ef4020fe25498dd348f698d64b1a82adb0403f90b27af549945bc1. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZ5AB2263371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa091c1c0a12dd5ba26f3e5a86794095051e49cbf2be0e07f631207b0194ac156. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZ5AB2263369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7678dcc3415e288fb759606e1df9e67b165441be001fdf297a07af56423643a5. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZTVM2104195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f9901a8baef14d755754cb028630a0f1466a33f33c4f431cf5a17bc22806e9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BC96H2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947a41629a4ab59f861819f01b35d404072685ad74956b019947746dc8c3b6cf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTRX2204353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac351d5770e50d3a1f051fd85c7267caf34279aaec687bd002335a18de489309. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC96H2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5174f761d777f6d047b81fa61084cfc2b463dbc0793619a4274f4811eaa4087. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZHZ52290824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ec4a2dbf0558057fad3fdee37b59f04548b538998eeafec609fb0e9a7cfbce6. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/BC96H2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe631cb75769dad0a971df187b3897643abcaa5f37f1a5fa76a6f69f5b2842685. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BC96H2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5673a16fe60cdc6a3fd9bfeec97c5e156806694cc9967f39769cde0cda64f722. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BC96H2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b05b6ae3c72fe4a775d8316ae5bb1df232455b93b4ca23fa5d2b3f0c3ab53d8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBRKQ2383023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e259467cf8b09f50a85f9eec321a08e804b6798a3cdc08fcb75598aa792bda9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BC96H2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3410b8343e52c79f74b80f335897b2df3578afdec205c97f63b0d463e4d5e5fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BC96H2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e5d8e6085d03cb27abeec962d0abf8bd2edc8aff03d10ca2c43e0dfea515cbb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BC96H2300020.