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 0xd71bb2a11bc3eefb2da86ea89d825c22a0aea40f1e85b4cc1a8e3a89dfaf3b17. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65a8158b-8082-4dff-999d-d0ab973cdcfc.json and https://artists.proofprofile.net/proofs/artist/65a8158b-8082-4dff-999d-d0ab973cdcfc.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 0x4e9f55a0bc865462e3a78f27e880d2fdc1ffcf847db81ce5bb374c6334982d05. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ESA112432559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d5cdd79149dca52e68fc70f298639af7098b411d0432977a959b1371015557. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:13:58Z), 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/ESA112432560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1a0c6eed8ca75f132fe771db7d853063301f46b7d0d45ba54e33e8f79f78b4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112432561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x206c0b0e5ffc414221e12ecb129dcc997d3caab89331aaf5dff31a166cd56a63. 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/ESA112432562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c3c9fdcf88a6cada01110750d8eba3990572afe8d9ff9371c63bdb8addd37. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112432564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2512ccd3e41f15e23f615ca0ca70ab52fe73cc32f00de69c8b5dbdf07b94da. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ESA112432565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ccc6c63645b2789299d6d97a2df33eb993873f5273e003cbe04d31f5e7733bd. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:24:59Z), 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/ESA112432566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd65bc7346095c054cdb16e8b9e91de654a05b5c7390d6e7bc395509c1fe38781. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ESA112431930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92bef5c05811bcb4ca2220880f4f13f74687b830346baaa7878e06af7d38643. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:12:35Z), 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/ESA112431931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be84cc39959afe14ddaf5133d485159ff1aa3aea2524ba5ebb8e5231b7dbcb4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112431932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3f394a3eea35c31b8e777d926321a67dae6d0d867693403fea4d7c15569887. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112431933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab4cd71434e4a4a64d754fce7d120dbe10d75d63777d1966ad95a8659a7cdeb. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/ESA112431934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b82b7f7a4db9bf3caced3c09314bc4dd741a241ab11e89e0ac47fcb6d49db4. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ESA112431935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18e906ece95e5da8a203c7c1fe811671d6e3f909640005dae53e782c0050bd2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ESA112431936.