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 0xa3c675df68df5c3c29d42e677abcf1d2dbd91ab9bfe2c2aa7cdf04eefc489184. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f6b3dc3-ad4c-4501-85c4-2b9067e0905b.json and https://artists.proofprofile.net/proofs/artist/8f6b3dc3-ad4c-4501-85c4-2b9067e0905b.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 0xe848d4cbecbde3a7ffc6cfe8440c26c95e28e6260a43efcda723054a1c2a3f96. 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/TCAEA1841896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bf1d4266265006bdb7f1611eb8a7da07bb25217adf3dba0ca97362e65164d9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:02:24Z), 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/TCAEA1841923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8bacddead1465acf084c5868a9931a2a1e6695193d591c616b1a9590bc49923. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/FR85U2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfe76ed821a1d41c44215853614449b39dce5c04bc3f15b95600aad5e8076d. 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/FRX282114395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aef3db7a17b32ea6537bfb6df7ae97c0e245463723bc81f60fa2fec1867fb6. 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/FRX282114396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66d5876e6ce29f741f40240ccb6d9ad59eae454372a7146b9bb35c57d32ae9. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282114397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf94f0c2763f2e587530853fd7ef1a55e643d7972ade15595b6a6439ac68743b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX282114399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa395a6a38cd6342969630888b9a5a05154e42ce6aa52af03bc084c0d452b945. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FRX282114400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebda43c7f156378c4a03cb4dcb51fab1b36d019ecbcf28f73453dac36829a4e. 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/FRX282114401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf842baab8501cb0c1954f068a544a356ce4d1a994950036cf4a508d61e2a96be. 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/GBKQU2143269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e345ec32d104a9316fc98bd8692297c100b98178219ab5bdbd4fcdba32c4a63. 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/US83Z2211348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe058015ebca21c0159991511f33ca35a4b5532ad06e7063029448cca51d086. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US83Z2211350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe058015ebca21c0159991511f33ca35a4b5532ad06e7063029448cca51d086. 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/US83Z2211350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e345ec32d104a9316fc98bd8692297c100b98178219ab5bdbd4fcdba32c4a63. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US83Z2211348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e345ec32d104a9316fc98bd8692297c100b98178219ab5bdbd4fcdba32c4a63. 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/US83Z2211348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0b488179efa4e0a8c4256cde4d3ced285d8cb7263f63ecda68d3c45ba068b68. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/FR91F2302400.
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 0x78e99c9aa8856f252021349837f672962db163f41fc0c88175f0da4bef196ef7. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T10:25:01Z), 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/GBLV62307863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c17dddd1c5631d43fb424be7a874ad14c14affd0298ae20d89e08de8d61b997. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FR6KO1500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b4a9d44e67a78ae8305731dad6c66e20f82983a7a9fd70de255393a61dfae49. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282114398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cce4eab946444b9c5bb350b02720ab7e77cf5ae780bff0db6a90a700fbb546b. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX282114402.