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 0xadc57b22f7947a07e4679d7871651941aa1d64a2a7501ed70db6ef56f0409f09. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd4361c7-2ab8-4537-8ae2-3766e0b333fc.json and https://artists.proofprofile.net/proofs/artist/dd4361c7-2ab8-4537-8ae2-3766e0b333fc.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 0xb99536ea124ad2d6be4abc95ad34b2c57a8f9b0a46ae63c5323a9117295173bd. 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/DEGR81405158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465dcdfde9d5c03c1e9aadd5540b4c9d65d4e002fc3822b361d7874cb16485cc. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/DEY472171959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5b960bf566d02cde77391e54c3956841b92b08922d9c83507a618e683bffea. 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/DEZC62249998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19c5c7e286b26529e97d2cf7426405c49305edf33b07179f5506ffa0b310614. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:36:08Z), 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/DEZC62253318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ed0323b912e05d2f65278a8d15e08ede0805b439dd4cddf676085d4be0b843. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/DEZC62258730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a38ec7cf4c2a135465802447d4f93b2e1d903a73432b77d1c89813775dcb36. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/DEZC62261810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6334305a1647e019354eab2fb8ab0763ffacf9921c9784c083e25c3c70e40150. 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/DEZC62203856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21892e317248aa5c9966c95263ffa524267b6deee9573413d5e0a31f03c501f. 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/DEZC62216019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a671515d814d81c4d367e51128d665bbb6536b127d93d9b58d029a265aef43. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:42Z), 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/DEZC62329795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd324c1aad2d6aeba50f7898b807dfd05903b2fe42842be1785b896f381bc89b. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DEZC62412720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6721dadd3095890c682b9f08e7a9ed5b6d733e6407a0dfcbb9e7baec036f0022. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DEZC62437556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55068d0b6e2af176062b05489b6b0d4671dffabd047e571052e8165e656a6de5. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/DEZC62443942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2538a0ed9c057a255a457d96a3ae2dbaa4289699950c7e10fc332bee1cedc98. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/DEZC62451676.