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 0x1b542c130ce2c719b8b045dd54eb723c9d43ac184a41c9cac2a9f16602481b58. 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/406fe735-3950-4723-bb5d-e5143190feb0.json and https://artists.proofprofile.net/proofs/artist/406fe735-3950-4723-bb5d-e5143190feb0.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 0x7e6b26f6ca83a5a661e7880208da9dd3f0d472da787d4fd76e7a21bc27b6f73e. 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/QT4K32519231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc084700605285ac0ba552e468fad858c2cd959a08792dcf06fb7d5b373ba8ee1. 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/QT4K32519232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5976f1af2d98af87b1ea3ad1068dd3a85a06ae5ad02880089da080d8848e4ef6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QT4K32519233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa412747bc37aeca7b55d512f7f2e3c3daa0bb5149817cc6279c0b1c01e394828. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QT4K32519234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd166c3153a967db9df3e9a05a91c07866dd17e43ab61729ecfcd59f59b7de927. 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/QT4K32519235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421e5f2c89f97f04243aa0d285577c9a8cd50de3fbdd7fbdf3c8dab79cbbbd47. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT4K32519236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c3befb3989325269e0041847b1298e6fb92258468f1546d297314d3ed681ab. 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/QT4K32519237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84090e41e47e45d3bb6b147999a5686bfc9ca92891f2a4b0b5f2e9e743f964b1. 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/QT4K32519238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce0d99c2681a89a3e8818e4a18c581753d68117938484802bbe2d8c8988f3e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/QT4K32519239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f9450fe2f9c55024d632935151f144e0af9c89c1bcc4119a651af1a2790c77. 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/QT4K52593087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095ca75f0aa25f06b9f36165796b2928c1082d2d76fad7fc265e7ba5f4e4a2ff. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:59:38Z), 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/QT4K52593088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b90217d221c0dbf3c08c477e35f9f3ffdff1cec01434a1b0d3b197f7e7c8b6. 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/QT4K52593089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e0f2642c87d914cdef0b542e54cb2d5316cc34a920bde43e5cd1fe35331c7b. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT4K52593090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b52c1d9991d10d420e5aa2c2f7273ef50f1d7516f0b2a8a446deeac8cef02b9. 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/QT4K52593091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa72f9ba5840c6732019dd71a8f3c628b40f521eb5b9f7bcefd4ea8342c074992. 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/QT4K52593092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd12fbc75bd5473eaadefac423998b30aaf70d0c9f23e96d5354fd3d7df8b12. 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/QT4K52593093.