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 0x1aedcb7c049bbd1477bfb0a9162adffcb2c32d848b09a1a358a374db7b38b385. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1192232c-662b-4969-948c-8671ae50ae78.json and https://artists.proofprofile.net/proofs/artist/1192232c-662b-4969-948c-8671ae50ae78.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 0x1bc18a0dc97b89364502b20f15b0b51a7cf6e179d5a7ad06f10f24d881e3f16b. 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/QZ4JJ1971303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe8174f24a25cd75170c5d9e2de7780fb0df321fa380ea861de5d2b9c144b12a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GXBAV2423011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d892ef3671b9f3d41558caab8926c94d3c586decf7479a912ed91a4670f8fe0. 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/QZQAY2529861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d2da911301d6401095c71f26d21d4309b003250e74890c9bd8f9544feb5921. 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/QZQAY2518868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6690a2ac162774c1fd491f121537150d727916165c0383b2ddc281c25e0fa995. 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/QZSYP2412412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3089f689b72e6d106c2bbca9640e6ebb8bc62a608a094a3d569f13654dfbe7a2. 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/USY242491779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86232937595a5b0e4b25e56dfe7d3ca7861b6254af0e93007b0a5030e2c0235c. 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/AEA3A2292639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15ed37ae87d5c420d9e34251fbe20f9c4779bf0bd12e76a10e596637485943f4. 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/QZS7J2488141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c480560e13cd03acd3930393c38a1d1a83116c9ab70b9ba4f7025a1b13d09. 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/USY242427924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719ec5b6ba63dbd58889602d11dbba46acb10e7a15738b3b1c060f98abfe0fb3. 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/QZW9K2494438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5973198dc0306eabf4bbfa20a1b8ec01875f240770ba19b8ae717b0cc747d58. 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/QZSYP2410778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a38cfb6846a380962a19d82488a62a2944e3df8c2b931542cc84fd6ceda5e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USX9P2407542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773d632ada967ff02f9a74390bfe3412b562b30da80cce3c5986586d6e9c48e7. 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/QZG2X2402788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83e45683fc2d922366cc402822fe2882cf69fa0cb4dcb8e6e804a9255bd8bae. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USL4Q2482709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5adafb0b71c86557aaafc0deb234e49af5a07a909dd9e0c494a692c206eb7f3. 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/SE6QE2447134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe155cff583fd880764b9f188b3574f4386020e219cdc0a7d25da4d3d502fb7ec. 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/GXD7V2218651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b28904929e4ff338e7ce8e1d659847ea5d7d20c75a40e7ae130aa10dd8f7c9. 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/CA5KR2457859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecd8be3db56ee0d13b3edf6459ed034aa51593870c503c20a9260f6e1890ac1. 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/GXD7G2448381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8fc2237eb7782e5174985e8bb8160b183ab0ea61f59d3a036ac3b7b49c86a. 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/FR96X2444241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c78ac6e8900515314dcb4b52cf881db46b93d4f58fd3805a9e6a33244f19764. 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/QZGLM2431334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf1e8200cd2d7ee4e564d6c563027bb6feafd064c1c9e293ee95eaf1349ddef2. 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/CA5KR2392179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33b40bcce7c07ea3c08f146049cfca49c79544f8306c187c6dc20c7f82a2602. 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/CA5KR2392186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb69a63d68297382762994a1c31529afeb8155cca10219fefbfec517ea5743024. 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/CA5KR2392043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca75c0e3a5358a439b81b81985f16d3545a69bd8130689af9b4917363725ffd. 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/QZNJY2302280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24f98680c35937de4a633235ef780ccece8dc22656e2dd58f0ef6382e72f875c. 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/CA5KR2354773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e82d7fd6ff19ccce2c02a92e10b64c026a69b044f0cd97ec3bb412684c777f2. 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/CA5KR2354018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4eaf43b569c02f960c92c7865c2ee669e98a3641fbec5d5e470805d8b9a1ca4. 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/QZ4JJ1992390.