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 0x156f4fc8d24e3f60f978eb125cb93f1f6e287b6e660aca8d1cb46ec9685bce1d. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d049d55a-d162-46a8-8f92-1fffdc32a9b2.json and https://artists.proofprofile.net/proofs/artist/d049d55a-d162-46a8-8f92-1fffdc32a9b2.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 0x61090308d5e2d388726bc492026b0a9443c850cdc1145b5cded0792b7677d460. 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/JPR562200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a19a01859258d70abb9469b01422217298ccb3c49163e63aa6d6c3b4433350. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/JPR562200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61090308d5e2d388726bc492026b0a9443c850cdc1145b5cded0792b7677d460. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPR562200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a19a01859258d70abb9469b01422217298ccb3c49163e63aa6d6c3b4433350. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/JPR562200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8c5c1949d216de24f6fa64aa74175f7248fb49a844ae0b90589a7985f765e8. 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/JPR562300153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c430ae84b5913b3b1d91600c83c7bb6fc582fb91ff06bba6f905c8d453644a9. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/JPR562300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c430ae84b5913b3b1d91600c83c7bb6fc582fb91ff06bba6f905c8d453644a9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/JPR562300229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc698c81488705b0fdcf992d316924859103cb2f53232c2b984ea3d90d8c4fd2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/JPR562400166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b2c373e18f1a612ff146a8e7a3adb2f34cd780456e4a901e6e624b89be78d9. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPR562400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb06d92f29f9666783215395792d92e835a3021832a665c57ef613bd1faaaa105. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/JPR562400196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa07572db8ca2de7e835bdd4192c254d05dc6526adf9351147e916478d31f18fd. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/JPR562400200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819df82bda370808c671ef8f41f468cb70a83928711759323dde09e5188098fb. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPR562500152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e86f02dc27a82a5336c15bbd8de961c77b0c225def0922079f11b61ccd366b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/JPR562500153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0abadcaccb275cf138c2949ad92ff69129e184a4dd3ba644b4befd42a1346448. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/JPR562500156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6416afbbb70c7a2c7f4a8bdd60e66df9d2e04aeb2aa61b52689c15c63ea006d1. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/JPR562200006.