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 0x4e7d8e4b1617f4efe65fbe636b7d810feb2194afc0bb1da8a6846a4808391a74. 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/b6c6813b-064a-4496-b2b7-f93ba1638bbf.json and https://artists.proofprofile.net/proofs/artist/b6c6813b-064a-4496-b2b7-f93ba1638bbf.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 0xc38cca3c8d3ad6ad6cecca2f3bb95c3ad135075b628f09b8175b9938a4fc63c2. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:35:59Z), 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/DEZ650707169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea489c48ce9389f8172a43aa45e2710f422fe384707dc8b2cc0cabe1763b99b3. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/DEZ650707170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f5a8d1b2015252cb04c4b39e8c8f66b701f7f4d35fd7ced0f6952bb04d451. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:12:22Z), 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/DEZ650707172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbda0a0aecde111dabdba794cb8cf40608ad830eea825613a94caa3e3d59c16c8. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZ650707174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6efdc3e96e54f653e88d27ec5e85fdc30cc87b1b58e12ed03ac39ffaa196cf. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEZ650707176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb277003aad53a3eec3c300956a3350007cdab1fea9a39b99fa513f5db19a7f2a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/DEZ650707179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8617d61367027ef0e8aeb8141a23fc456bad0101fd2652439e093e6409dcef0. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:08:25Z), 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/DEZ650707236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cdc319719cb57c9fbc94f52ac15354b87d17104e71790ee8ecc9408959c5f7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZ650707237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e8c78319e4761f12d4eb9299a1ccef725c47bd02c23d9a17649a5d0a3aa12f. 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/DEZ650707239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75934645921e98648882d2c81bc2883d70a58174ad51695eb3349762c7ec24ee. 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/DEZ650707241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4238c14e357c477ae884f186a351dd23adfc06c93d6b47fa79458a58e4f835e6. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/DEZ651200475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf303e437202fc195d9183097b956e959b431b973aeff8db18c332bdc0242aee8. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DEZ651200476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c089af57405362b1f911199236018ca98f095a6a927c79ee7e584fb6f6497cf. 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/DEZ651200479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98da615b9d39d3f4411c45bfbb8ff27e4337964cf8b47cf2d9edda541fc169df. 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/DEZ651200480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcef2aaa95ae86136b437854503f3e913733eaecbb11538bbe3e1f892496317e. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DEZ651339979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28762965c6cd5f249614ec121b7669cb3011ea39de86ef730c9fa3c37b9105fb. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DEZ651339982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdf1b49fa8f74c32a722bf8bd21ea56e692ff4f919148491e442e195ad62faf. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/HRA042198516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06e117ef2654dca232c16562b363ea2b3f24f3b78d9389c02f399803ef316f9. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/HRA042300766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b0c6e185e6f86ef3b373550d492c1142805fc83c4aed155e6d840964cb9c82. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/HRA042300768.