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 0xd759100c9c9f021a612f7bfa0f67c5eacc63c34099efca3bf4dcd11e8d2852c3. 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/ad5cc9e3-881b-4416-88eb-917287d27466.json and https://artists.proofprofile.net/proofs/artist/ad5cc9e3-881b-4416-88eb-917287d27466.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 0x7bfabfc2bead793df21fbbb39ee87f388f15eef75748865e235c0b7b2cc666e5. 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/PLC071012002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184b2ed95a4bbf81fdfd7bca51351ef789dd0750f13b1d801bfb45eac937a9a0. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC071012003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6091a7c1a65a7b127ebdcd6d080b4985c325a3451f1ff6656c007b505f2a8bd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC071012005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf4416d3877ffe64d917c0f2c100b24ad37a8c9af034e33aca22e999c28b0156. 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/PLC071012007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944ea5380303ff6aec502f8aed40f1577dd8020442ad8f37a1ef329d1fa4ec37. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC071012008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6e4da27273ab7ed97d6080891c86848d122ec538798814eec97c552a19afbf9. 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/PLC071012009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4d8d186e8742f59989a27641196ee5a68d0cfa51c4deb2c83d70e99ba2a40f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T01:12:14Z), 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/PLC071012010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa80dddcd100701de9cef80d22ed04e6f9a0d6b5c932f7dff74bb798f20e6de3f. 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/PLC071012011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58775076c4b916d5ba0d9a9deca87a377187ed1b3f39e8b5a7bdd460772ca15f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC071012012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a13bd55325ac7095857731196ebd7266b960935d179e34203f23a7e4e48d4f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLC071012013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5ea76d2b1ecec423efd7665b90fafb021f60b732c218aa31444417895c9cd. 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/PLC071012014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x580a54e095319ac46c51d2a708176501e4333350283252ac180154cd26daec6c. 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/PLC071012015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8686eda2304d956c710171a6a1bc32fd5ec4e6c33c14185e7be97f1ac1abfc0d. 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/PLC071012016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52570ce8cf5eba011049ef65a670c10065d8cdbece14346ac39dc9d4a7ecaffa. 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/PLC071012018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3196c846965feb157f3ac419f87408d3ff08413477d2cc0ec7e6402bbfe430c3. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC071012020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648c348232591035d145fd060350a3f4840a522e0ce6b55ad30fcebd34ac81a1. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLC062407389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09dce34e3e73cb82ccff5708e3a2532733faefb92ec5b7b6974944373911884. 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/PLL371400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf6dbb56c0bd0edc9acd04a6367d975e651af0ef941b284bd6632054c6528cf5. 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/PLL371400124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbab31b28fc469136ce7ba9b223d143f1ee0d3c3045dfa03f9c643554f30f23d8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/PLL371400125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98ca2b10a213d870095a6b2c7fd0886ce3a0ac6ae526ee7f7dcbdb40f65f47e. 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/PLC071203013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7e63d1ecb72c659a0de64be65ca21cc5a7c3587c329f9d38d16a4a3ea7260b6. 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/PL02P2101006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc70cbfab09621bcecc40933d567982221f773dab40ac667754f9bf9179a499d. 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/PLA380609202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2acbf4227b17c16eed186a5c33b2f36e6faaf1ecc145b83d975c7c52d3d7a03b. 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/PLF241906053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef9acad5a0174b5153230980d3d951bb4dc74118a0f7db3b95722490d020e9d. 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/PLC071103014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e605761fae7d39bb217a56170873f7d3a645393e7716fba1cfcd6ef013b69. 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/PLL371400154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb029288f1a58a5b2f876c876a89628cd13e49a22a6fc1b8f64bb9a25b3bd10bf. 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/PLL371400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ad4063a2fc82381f79c5b920683e7c60ea387aaf5128dc9c4fb5ffd02a0c2d. 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/PLC070200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4896afc19cc4d76709939084bf5845625da28f04e49896068e67df6cddf0347b. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/PLC070902010.
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