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 0x27e639069b0675336f0be1ccb704096048ce4d0c2b88a6be50bfc9ea3f868aa2. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/732c2dbd-335b-4faa-af16-bce9b14a9b12.json and https://artists.proofprofile.net/proofs/artist/732c2dbd-335b-4faa-af16-bce9b14a9b12.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 0xa6037216e7232455f0974943eca54ed05d556d6c26a48b49f45280bce6e5c363. 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/ESA011666802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1326ee43d6a1d448b74dcb525996b6177a9d36cf026611d1605b7a17f7538ea. 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/ESA011728141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4edefa758b91a808cb929b282a503f242dd0e3241a9c4a591739d08ae9f2af1. 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/ESA012110929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x289e666dd7e51d08f201128935c21444da3eaf87524aa8f924d073f22d4fb67c. 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/ESA012111948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ee11a94e09ecb8c5468eeff93e3495961150f53b9b42d8965c394cb9e627e0a. 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/ESA011766830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cef681eabbbc7a650387486bde23ea714b18f6ce6418fe5d55e4b851c313d7e. 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/ESA011870462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222d13273651d4f66b350254f21ab865978173d890651e1660a5d03ce2bdfd3f. 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/ESA012083407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6b38283f93991b8ed06a4656ef02ddcd76e6382112d63624211ec8b4055c98. 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/ESA012014118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1130ebed75de00e60dc39c3e34f3fbc069fca5780ba4a6b0299c1932eae9137. 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/ESA011990901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad3c95e8010d97184cc59b607edc79ee71bb7db614b7bce751835ba885ffcf67. 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/ESA011945234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2dbeb837eda5dfbc26f783a6a4d5a3f0f340c655ba99ef6c505401b35a3717c. 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/ESA011923957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e1fe9dfc2c6e9abe40fc451432cdece3685dbd46befd6601245ca360aaad74e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ESA011911603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb45c38e3b1bd0b937657b6986d59235095dff16c45bce79997bf96c2c089d283. 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/ESA011928463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0120405eb927314fd6ef183321161a6d798fcec9c260b382d1f4fdcb028587. 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/COAF42400528.