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 0xe8093f1c0d116789fc54762acae8bb005c592d1dc46a0d27eec21478e4e2678b. Chain 2 (Bitcoin): anchored in block 953758 (2026-06-15T07:48:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1599cff-bfb5-447c-b730-546142de4747.json and https://artists.proofprofile.net/proofs/artist/b1599cff-bfb5-447c-b730-546142de4747.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 0x29e52a309aff61987e71bfabfce2b0b1ded5a509c871e3e6df356b9fc4da5b6b. 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/FRX452116403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b98042c46078abdd29e7c85321ba1cb5e152de925245bd307ee6b4c043e3922. 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/FRX452116404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e741f4a5a1003d9c441cbcc7b0e297f3146223e931622061a547593fdb24db. 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/FRX452116405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cde6a31693a2bc7368aebdc65e5d77279952305311ac33391ec471eb4cc68e5. 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/FRX452116419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9019e4c075f4e6aa6fe295c706ed3dacfb921643db4bd819ab760bbf9a16280a. 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/FRX452116420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee0f0896ed07f417cc2852da19e3eb5110e80ed88e197b65133183ec0de5197. 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/FRX452116431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce470864f655149bd23d263bd236a3e2721e3f3d48a9e77f730d583acd5e7144. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:59:55Z), 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/FRX452116406.
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 0x46ddf4fdf35fa38041e63cd0bc0185697599e1ce6f2c44592bf4b9406dd5637f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/FRX452116408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5868191598b3d28fd1a481339f8893add9c50c89ca5b01d84debf4412485e1f5. 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/FRX282179010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c89bddbc8b2baa2ee2b7388fd0cdbbd45bbd23bc0cd0a74392f5cf76addbd77. 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/FRX282179011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7685106bf7d76dd369ecdc2b0dffe1a85b61961f5ee9de02ab5f505ce89b14a4. 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/FRX282179016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e84c5cdbcc67270211f4e7859285668277196e1dcd7b7154fe2a91f80168bab. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX282179021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14ea9fa9631db001539507f9d340cc9f1d0471676d47ad655c1e38cb31310c1a. 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/FRX282179024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cb37e9eacad09bfbff7a62bd605076a7e6ba7d5b06fe9cce89fb7d101a19ac. 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/FRX282179026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957f99c52a4eacd460786cdcebdf7e5dd81cccb0158790d7488f3c2c79249526. 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/FRX282179028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f04fe282bd09bcfc81a26e2068cb00588d26960ee66f0d212b2c6937445156. 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/FRX282179032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ae791362790cf8e8e9278b19ae3577f300ba30f91023bfb6b936f40dc7ac95. 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/FRX282179013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86950df5d9d30354492add159e71ff02de3ca0f4e1bd9528c602278fd678adf. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/FRX282179019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d1b7d7c9230d88ccfa7dec1ef3324a596512c59a380533a3b58f2ac3f4b41b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX282179038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa16d3ad668e0ca2c60c6a57bd8949884c0ceb4053127c513ce254812b0575a4c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX282179040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315ec5f068b9d7007f50acd5790098f1460710b120dbed2c1dfef5726f595c95. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FRX282179062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7044cb0ed2fbe0ba136aabc42ec895457f5e86fcf29f328756e1b072b58598e8. 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/FRX452130948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f9e3452af20e629c04a40776b1283fc7bfbebf6b31a96f563952792029d105. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/FRX452130949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x297f9e0db02546e5f4e80bbfbcb0c6296b1cf644ee2de3258aee4223fb8e8b71. 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/FRX452130956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa872cebdda537da4f3ace3fb458dd7975b769a220fee6b3fb62ac858c9392d. 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/FRX452130959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4c682b141747c8a8045c1549808f01204641fdb30f365d59eb9213abb89d47. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FRX452130939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e996978f87230c5c86641bf94992c779c709f6beee7bc3f83ac3901228cbfa5. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/FRX452130944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2d8e21e22a8f7b7558edbe6f2fb70eb5fe74ec0be7a0007de7aee3fb1a7f48. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/FRX452130947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93c2173de134f9d6e950be6388c968a77f5fbc4f6a78b7691ec44e9a91009386. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FRX452130963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578fb7eae94e36b1e85554dbf8628be2cf27c1ec469309afe90f62fde1cb702f. 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/FRX282158946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf63a5d4d8b42ba0cb45041219c6b91010f95e84f1e224341bff7c3d2a6b1c85. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRX282158948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c85cac64b50848b373514083cc87e4177183e7062a0134f0f02be81f3579fd. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/FRX282158941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8ff8e59eba99ff68734978ea16911bf3abde4f464f3af2b26b77f2dbef67427. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/FRX282158942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x151c04d125c7b94df13af6d7836867354baca19b07840dc50b662b5e9d672277. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX282158958.