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 0x71627089bfeb48ec393251ca8aaedc988a40f4c443ba44604ff072f70ac0e49b. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e423a038-8603-40f1-a9a9-33afd211e244.json and https://artists.proofprofile.net/proofs/artist/e423a038-8603-40f1-a9a9-33afd211e244.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 0xb9a16328fc2a961072c047f7d9cb904605a163336996d8c73dc26f2e7cfaace2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZDA72558804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ef8c4911f6c7365cf90f104a01c29c162c323eb062b8b39c91801f97759c0d. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZDA72555551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0231ab2131e2664d194033b54577b1d47b7298fb9a97a9c483afda1ea82b77b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZHN32542635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e3415f736a367d68d1048a71dd685ebdf7459ec1da196c3c878e8a55a96e826. 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/QZHN72589737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d000be9c6c5aee5e22bb8b6764475df03112d39507788b3f97a1b8e67f4f76. 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/QZHNB2521684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2678727508bc0fffa6f2235fcffdab7a801eeacff5517c3f01fffe9157c833. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZK6M2563383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e70d119272973f8121259963ca71ee176c68009da3563237db1ca16771f50be. 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/QZK6H2557885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274b3db966bbffeaf62f99207f013ce314816e5d663b184f5bf30dafdd7d2164. 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/QZNWQ2589600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70880363a10a95a046e8018d1f3a3a121f95f3900102209aab51c244fa55a72. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZPLR2592980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dae7e9dc1b87b77131d2e8f84393ab3f2b5aefd7efb98197908763f409d70b9. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPLR2594911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bc03a3c71d95b211d339b31d31bc46933a3c0a41c62d60f08bc463c9a6a4119. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:20:48Z), 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/QT3F72545782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92263b1ba1c6308664f643c00ffcfa3512ebd599d71ad9df097a8e623ed19859. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:28:03Z), 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/QT3F72545783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59abc2dd6adf286e592e6d09e7d35805e5113ec68c5a68ed023907784626b0fa. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T09:53:45Z), 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/QT3F72545784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5999f1b55183f297cf608f30f01c03f7fc26cc26f4bdd43cfc6145e19135a6c2. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QT3F72545785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b648d348a8ecfb6d76e62d7944f84cc9acd6b8fa959d12533f77b7eb9cb72f1. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:00:12Z), 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/QT3F72545787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd463e6c480a2e97fa9a76909e519c0eb24e17197c02d4b0308983eb1e79f7a99. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F72545788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331af575734426c63303c449e665677a755c153ec35f69242c448c79233a2ed1. 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/QT3F72545790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832c811330f375417ad71f1e4754c4402f1a08d4e4715a81ab9ae0114826a3d8. 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/QT3F72545791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd27b6c1f96d18ad80feb65236ad526038e638aa2811b484364beb5926c6387f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QT3F72545793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fe576560acb1fcadd9a8ac84f189017a87e360a969e0c79c6aafa666da8e972. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:49:49Z), 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/QZZ7W2557688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878d4ec6dc6dbdd13aebd10d8a4f7236a07b39e533b2c0a4842ad30eaf216042. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZZ7W2557689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3230059945858fe3d2d636fbe88205badc75a26b5fe8316c8fa76a01be07d3be. 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/QZZ7W2557693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6001c8ba0f822cd6362d7260be1e3b9a5aa23d9f550955e133eed4461997afc5. 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/QZZ7W2557696.