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 0x61347f9e00861ce0566833fb18ae90a2d69a081810800c8f94af4e6a7bc9680a. 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/57ceaf30-cbfc-4429-b488-80149ff30ef7.json and https://artists.proofprofile.net/proofs/artist/57ceaf30-cbfc-4429-b488-80149ff30ef7.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 0x4f4ed83746fff8d47143ae8c44edab5e800f537deb9f74bb110b64f3f7cc5273. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHE2378149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86af8573081cab4959bfc612e701284574df2fe0d77bd7554f8e52f6d851b215. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHF2325649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d531a498c6f59ccc1d4854d67956b5e3fe4c9993f50c6cbe8b4678fcef87063. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/TCAHF2325504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821d5dc15cb3e8af8b0adbcc55922b70122e2429ac60848a911cb0ed2eef7bc7. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAHF2354184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcda04373cb1c87f883ff5d21d0b07c5453b10c6bcee32fadd861d8a3b2498d0. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/TCAHF2354115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332d6ae76b5e7f5f1deecb28cd2be0a68066f033bceea5475e9a243b009376a7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAHP2364011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a9b1f333469367fb9a41e6e2b6cfa5c3e5c6ea9db2069f5b537f4c79e860ff. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:08Z), 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/TCAHP2364053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff72fb72d129af7ff1dabb316d086c6c356fe18728b0be49b2c4959ae0eb159. 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/TCAIG2495811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53acacb9f1e148131c677224b5b441391496d8a44e04154a0501abfb267113d8. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/TCAIH2450229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe302db2799ddd8b78cbdef6d142293969d1889fb37e9136ed0501f3e4a33f105. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAIN2487140.
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