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 0x7f4b08ae92da485ac9a2eade50fe212babf470b757dcd74021834c25073e06af. Chain 2 (Bitcoin): anchored in block 954063 (2026-06-17T07:49:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/47b1caf3-962f-4077-9403-e35d5f0b0ca5.json and https://artists.proofprofile.net/proofs/artist/47b1caf3-962f-4077-9403-e35d5f0b0ca5.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 0x15ce6ef741682b35a04b94bba1e41ebac378c98650e0fa511535508aee1fbaac. 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/DEQ022010483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648b2255112e18c969d41a3f151ebe31d4000e8a9a718e409a003218d83509bd. 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/US3DF2005760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe364e9eb1b05c92682c12fd5ab6127240183c71ec57db5a53d76cfc7a7a11567. 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/US3DF1954270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983ace922346159e3eba0b59c7a9f0a6140c293e95f3a8e6515fb2919debfee4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/US3DF1954271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2f3042376509d042a0eb3530442a19ad436adf7f09879aa8dfdc230eeccff7. 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/US3DF1954272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed097f9c0201139c8590608e38de6b51cc97b86fa7d69b88e585fcf78cfb7ab. 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/US3DF1954291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84b463b0c6b355062e354733914e2a5e65320a5e44041fe2386ce4343d68924. 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/US3DF1954292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2436876967a91e7d186ce78adb8432b9ae9c0beaf8d2bbe0d974b39a44d84792. 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/US3DF1954298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049558723035944ea526977248d74453d930fb98ce5849d4ffa560050ff8909e. 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/US3DF1954299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827a41be1fe15a2493dc6afdef369172d6604f767cc022786db9535327ad81ca. 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/US3DF1954300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59c0afebd6aadec946c898eaad788fdcf39612e05803416c27ce4661f0cc81d. 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/US3DF1954301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3886142ccb7496de4f07e821ead83ec43322e3a94fbdf111ef05f7bea4adda25. 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/US3DF1954302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x235837632c6e528151abcbff2b9de3db019b58cbf8e4b054733bb121d1d5faea. 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/US3DF1954303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574ca25da4cdfd87ea91b9063e27d717f3f4ebb5f4bcf01390c00569f9890c43. 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/US3DF1954304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c1cf97493a23e1b6ec312bc5c9f94580632cdc141c37af91adb3df72bfe286. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/US3DF1954294.
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 0xe23595b81a596f65a406f37db1fd54637f45bc035ab5ec6c122e687f4e63ecda. 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/USANG1923755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641aef446ba1253d58de886ceb8e2023bbf0aca54ffcc6228ed332d5a3638856. 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/USANG1923766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31a7267ca2315b08f9e32539a2b0eb132776ec38d1f4de38dfb1b3cbe0d06bc9. 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/USANG1923768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0192235de3233487d53cca32dd4ce2a36e79e8c01ec136d2911fcfd44e6c9638. 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/USANG1923770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ee75e1aa763ed182bb3f1abbb9ecc41a7ad04a94c2a3bd02c878642de1b124. 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/USANG1924012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bdb769c06f0360562580b13f80ed959fd5669c059164f0012d5544eac17415b. 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/USANG1924014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1145163ca889f39a8dc6a4b2077615d6f987e04bb65c219dc4d10f1fabbb69e. 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/USANG1924017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08d66f08ddbee915f01d177625f3e0de07008a1ce220e062115c0bc6b9e7483. 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/USANG1924021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd67718c60eebc4fd92c2b7e5b2f206c2dcf3d18bd55a4fa0b4df74ca935b4e7. 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/USANG1924022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556be00c24c1d0be9880993974cbdf8ab84f217da3f36408a242afbdb175b99a. 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/USANG1924023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63a947536d4fb562446dcc95bb8dac6d3a1929f63b99d4e391ceaf35c3932e5. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/USANG1924019.