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 0x250f55fdc1777e0b9697cd78d3e9e0c1c36ff0814419b2e5ca2c41c63b79ef73. 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/57d5c67b-5027-4b5a-9128-149b95218282.json and https://artists.proofprofile.net/proofs/artist/57d5c67b-5027-4b5a-9128-149b95218282.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 0xaa69a8c08945cd6a7ba55fc1b7a207f66175669d6ce4434a50b35c601c0e8cec. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZFYW2020055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36db56bd825a6fbbd607aa94b8f03dcd636f024a50b42334b63267875e55ff6. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZES92022211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07aa506c59bdc2c3af3792327b01774f3ed8d8a7afe54e5d4e3808f767b9798d. 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/FR7OZ2000070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5a66cd7a78ef688cc12dc76a5d58efddab6f5f03409307890ac055142ee888. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:49:56Z), 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/FR7OZ2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393c1072787e6758829c1888f04a44fcc2cb336f52b78961285cbf0399c7180b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:41:12Z), 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/FR7OZ2000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521efe48e1e57acbcafe6601fdbb117ce7f9394147ca7f78595cdf38d8932a65. 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/FR7OZ2200230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0879b9df9d20a941efeae2dc1ac1a9eed68bb2a65aefc1913761c0d2aa3cd. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR7OZ2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dffb682e394288545f66803264030a35039569e85e8a742476cc5dc292bb17f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR7OZ2300270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d0879b9df9d20a941efeae2dc1ac1a9eed68bb2a65aefc1913761c0d2aa3cd. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR7OZ2300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07131ddb0ea7146ae48109b172de1a5d6bd24892fb9e486bc500f9e2dd0b168e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR7OZ2300280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b3328dd3b1922fefcbe602d5720bec1d42de2db0994fe1763b93e813225681. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7OZ2300290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ef908712902c15b6d1ae487ea18d69c399ad7e4721c1fbd496a27781630649. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7OZ2300300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa078a37962ce6d84385438970e779a66b45f77676f4286a8920f7df2ac2864e9. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7OZ2300320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x756f0a2392ddfb29c6354a25b561a84cd1a702a93669f5e398fd2e3a8c72ab91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR7OZ2300340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd25d1d0de0e7c1eafa02b2ae2338a6a81cc551d366aeb3869b966acce967fe. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/FR7OZ2300350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa434e87b4eaa963199c01dde3429104a7b3fb8b9825a95ac47410b3fe2f461d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR7OZ2300360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd448bdc9251dc1096d9ca957eb1ae70ae9ebb98d8393d6d7be5de38f55e97572. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR7OZ2300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1415ee6d3bc707df349e2d45113a53a9f056561d439b5dc3039f92aa6661f9e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/FR7OZ2400440.