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 0x8af015649ea5546781823a88d175eb2de795dca725cf7bb799f7e6fe7bd29cad. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b7616896-dace-4969-98ba-b735409536bb.json and https://artists.proofprofile.net/proofs/artist/b7616896-dace-4969-98ba-b735409536bb.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 0x0aad3f93bca2d1c07a81f087e8ad2c21b79e8f5c80602b1528caf153231ca0a0. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/ART0G1207206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58342387722284f9e17d7fa9bd065c04cd2226169db1db6fff96b42f5ef3a2a4. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/ART0G1207208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2237ced01b02c82657d8a23dd0a6e1fe7210f939421b5930d28d995552077e19. 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/ART0G1207162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021a6e26ff371636005db198e16f6bd03a3f3f75d60b9991e41fdc53c777eeba. 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/ART0G1207158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad3f93bca2d1c07a81f087e8ad2c21b79e8f5c80602b1528caf153231ca0a0. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:56:06Z), 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/ART0G1207206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de180e144a7e999dc9e3c540974f8f93ad4534109d20b5479293d727b9b71e4. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:05:20Z), 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/ART0G1207081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de180e144a7e999dc9e3c540974f8f93ad4534109d20b5479293d727b9b71e4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/ART0G1207081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c0c3eb7c14a3708f66a46eea0815fb25456ecb08fd1605419de6757fd86624. 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/ART0G1207195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x226515b62445db887cc807668d83a453e9fcfbaa69de5fa9921df96a256f3068. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/ART0G1207191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bc49b0e267a04631d95d0da0e14d533cd2bd4064757d8a9f5c9842d07789d. 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/QZ22B1897322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc9a11068803be14cb153e404b06923dbddba6b188cdc166d55b40e4312979. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZ22B1897323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5643e60b7893712c6c4f9023b4bd38ac2113e2465f9de5e5efe955971c4461d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:46:56Z), 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/QZ22B1897326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84bc49b0e267a04631d95d0da0e14d533cd2bd4064757d8a9f5c9842d07789d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZ22B1897322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0dc9a11068803be14cb153e404b06923dbddba6b188cdc166d55b40e4312979. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ22B1897323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5643e60b7893712c6c4f9023b4bd38ac2113e2465f9de5e5efe955971c4461d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:54:01Z), 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/QZ22B1897326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3783c9151ef08c4ee1433edad4c6c6b7cc37b9d4a324dec5a21a151f6b6def6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:34:26Z), 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/ARIXB2501741.