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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b84b115554eef54bf0bafda5cf068ed2d11ac5a522510b7f0b7365969be0395. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/059234eb-b9ed-4e13-8db3-6f418818ff4d.json and https://artists.proofprofile.net/proofs/artist/059234eb-b9ed-4e13-8db3-6f418818ff4d.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0c1660fc464bd04d54f3d944426e1166a0898be2fc50b8f544a1e836cb57f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX202372524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a9e2082e893e4bcd2d73ccb34b43eca035c955322e7b298f04bd44d81c2004. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA082458069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888892e25c3ca86045ec86fcc143c6bb8fdd49bbae99ae0ed4cc61533eaaa5c7. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX872469088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fabdcba8592e6563fcb0006d9732e6e01cddde2f5891085a9eb3feff3c86f0b. 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/FRX202454728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae9b21e84e2dad1677a35388bb849cadd79413f04eed50ea9f911eacad7e6e4. 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/FRX202448531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69135ce8c9198d58d1660f7d72b0df475cf2f3d6d33e489788534d68056a8726. 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/FR10S2403759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x354075cc33778560849f728f07af0deb61a58eb6f4e8f8437dc421f90528229e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0R2317094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde85fd28af9f4185130f49c172d86aaf8d2004c26128ec5178eb1efccc9687e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0R2317095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97ad212757524e5a7d2e0abc4b579ff143b921427023a62b45189a5ef338421. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/DGA0P2323870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43435a8dd2ddea65dd1039f6403f3c5e038be89d7f60fa204c82d6fecb8b9cf6. 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/DGA0L2309810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04d40196a244e256bafde10d90b68e06f696ab0c5f99990f3edae9baa4e2068. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX202372571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a88004eb3d2d9e460599f119dd8dbf1f86c63df31b40abe34a6d8906742b81. Chain 2 (Bitcoin): anchored in block 960430 (2026-07-31T16:09:41Z), 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/HKG731734212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa808e55f21ebe56355a75072abd0b4d401a7681c2d76a0b771daabf32b389170. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/HKG731868739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa612843fb20220fb8b504cce71023b533d046dafda710406945404ba001be79f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/HKG732152899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35c2888d02e5b5907d0e0ff200b110d4bb3712858279a08214ac8ee8d200aa35. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/HKG732117794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2e473913faca4a2c2c5b60c1a1784e87b4253b6c7977fbd5141a71431130721. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DGA0Q2428183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c7e56c4be7f520e89bd83e1d5a90b5e3858aa2b139375f9d4487a7d50fc48f3. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FRX202587545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a00fe8ca7f8f477b6e600149e1131a3a106ebaac456e1e50c433a5a25dea5b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DGA0S2464469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb753088803b634a428fe2b6114ad484e4b83ea586ec381c669e2822ebb68c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DGA0L2428720.