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 0x45e796174c30bfce2b3acc3c3ef84c5649435313d22162146f3f824a3688adc1. 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/2107a925-7e60-40e1-a0bd-fd0aa429a7a9.json and https://artists.proofprofile.net/proofs/artist/2107a925-7e60-40e1-a0bd-fd0aa429a7a9.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 0x019d035c6576503049622794e0a474c77370728e763bcdc7620ee94ae7e5210d. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:13:16Z), 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/SEVSZ1403667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab69f5f02e3466d3c26e2d933e80b7ee8a1c48c548e52748844410d55f7b96. 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/SEVSZ1403641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66acdb814955047c64251184855a82347be10ded34e6a05cf7086dcdd569d888. 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/SEVSZ1403678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dca5d54a05e5e2efdbfbdf23e9f2853fa0eeefcc864366b25fed53d29755f78. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/SEVSZ1403644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc028eec652dcccbf3704754e247a39a7812133e65067690c98b92daed4cc4d26. 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/SEVSZ1403617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aa6932c2e68a2966df11ce5bef1cb53a657806a18a1b5e21d812f5fdcbc30ac. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:12Z), 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/SEVSZ1403615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87197b82b332cf897d056eedf164c7092fc16b51d560c4ee11461cea239d71d6. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), 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/SEVSZ1403611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbffec424460bdb682e8415829b4ed42b4eda3fb22cfbcfb8ebe545bf5a59b7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEVSZ1403643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e03bf617cbe2fdd937482d710f283205376299e1073553c00a649799ac3830. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEVSZ1403632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0eabfcd91a447bc1876b192ef46704cd0ebd2084af6bd9c4aeae8fa141068b3. 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/SEVSZ1403604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77846bad745e785307a0b3f5d7d15bebf1f011890cad91738bda13f7f8953946. 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/SEVSZ1403624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdadc4aceb08ff139c39e61f80d9c50f03dc1d36bbf33f953b5a9b233bfba2814. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SEVSZ1403654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064ceaf2429a7d801d43e34d62d0e1d014e5107199d0bca0d69c4fac53a0ece5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEVSZ1403627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562523ab9633d2e91181f6ac29b4933e70a72f955846c463437dabc691dce0de. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/SEVSZ1403679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac1468ea1c3df318a73d2f4c9c298318244a888bf7b7c0bf9b7950411adb2ac. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/SEVSZ1403671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd569073a3c8cb8f77c6d218ef328393ba068776e7b7c8359cee5e847ebd046b1. 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/SEVSZ1403601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6902f47f6ae2e1896c84f86cb05b65f7c042ac1bbabdcf0d12b43b2d6efd82af. 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/SEVSZ1403658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff93fd4beb615650e60de179f2681d65a2c8f98392b1ccde9301272325add7af. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SEVSZ1403647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5097836d0a864af74cf0674479fd771a69dd56d02605889a4e9fb40616eb937. 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/SEVSZ1403621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b29b8a757fe0c822f2386e182fd3b373e1063d6c21d03f76fd3aaf2695db3b5. 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/SEVSZ1403635.
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