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 0x471a857e75e14d8e7720b47e52178729c7b417e578a231e78bcc78fb06a879f3. 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/e894ab6f-3a1a-4e1a-a8b2-86b063b4cf7b.json and https://artists.proofprofile.net/proofs/artist/e894ab6f-3a1a-4e1a-a8b2-86b063b4cf7b.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 0x40524a26174e69cb061675cdfcda7ad5c7c30fc4a78ae7aafb66166f327ca815. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZWFP2363571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f6c7fc96d873d7c24308dc419de86fed56a49d7fef59a1f261984f135bbf276. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFQ2398684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dce550b92d8d7e1286f8c30ccf1e381d033247daeac6b5dc30f5d68da11145c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:30:18Z), 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/QZWFP2363573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19dc0a843a9fcf62cb5b77c4d589f26b63d2c7bad43c63de7d449d37893e583. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFP2363567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbf8f024bdd1ab600295666612d028cdd7d0eee52f7fce34fb78869b4ca7d642. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZWFP2363575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f4a0ed8b3659195cdbeb2c419ef44b7de90147b6d0609f34b648204e5773cb. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFP2363585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806c21ddf31451d3eb5a5a1e39bcff0175953ef07b08345644a28c4fe95ae1ef. 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/QZWFP2363601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4405aec2526b659bafa4c3ae35bc473c9439ae4f9dc47237e0f59c015f7d426. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFP2363606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd605ff344532f98e8fdcc30e3bed14ace5fd654e323a30927e02e989fb0fab. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZWFP2363604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc5a6b237b576f675423ffcfd08bfbaa8c312703e849ff8e209cdaba1eac2a2. 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/QZWFR2387839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbae78469c15ad28e13240f37d328484691c13d82ab883d5d1ef92f002e4a964. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZFZ42447267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5151fd0074de71d49dbcd575970c2aa622559c788397be559a0804b0bb407f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA72491965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97268a037c5c8e8dad391c7b7dbefbe9bb6bfc8c2e8485defa26f71e18626fe4. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZES92479117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9e7d93030a8c5dfca727e24799d87cd61712f41669bac0eaabd2857a518d8c0. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHN72473051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2702fbec7beb61b1735675fe0a49665b7cf4ee24f3f187629f6ca7ac506426f7. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:46:40Z), 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/QZHNC2423812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684c3db89e084d2fabd517d141b0d0a9e9960b6d2ecd545f575fe8331c7b3d4e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZK6J2423042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c231a73da0058942e7a159e435b1ab6a9e417bfe1137e9fad84a36bffebf87f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMEP2462193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118dc176f3d2fca21a663b7a2d43b60ba13d2fb6fcddc46c903dad9dc26426df. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:55:08Z), 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/QZK6G2440046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065535404f603697537da41a2ba4564da9e3198df13855106f15f0ad3c801997. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWQ2431181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e81c9e6203f849c9edf55693453520400bf726f1fd7e93ae4e6ce31c8fff0c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWT2481813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c5c4809c25450f73719e00bb8717467e88e76a9e5d1c19f4d2ed518acbd36d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZNWZ2422828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36dbb2f0905722252d1dd5a791c2dd881d52703313998350501e188c658e938. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZWFX2437589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556ab05f5551c5d34cba482efed137080456486d33a055d94b3267b272a9cb93. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFX2437590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac65ae5b5a802a79daadabf0d8bd464af4c6885791b29079ce4960e5407c4cda. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFX2437591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15a577e4ffe3e07df44a2afdb3138d7a97181d17a9ec0a4310cb84347f08f1e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZWFX2437592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1653d30d26d3e4adf70fd9ed02ff51fdd3669f5478f69e541e3064dcd7ca33. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:17:22Z), 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/QZWFX2437593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5aea3a0c496d0713df9e1ecb6a240ddb6bdf7cf7601f48cfa65bf8b9da7230a9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFX2437598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd148c1bae5d8c3f366f7f31bd7211d356c750024bb844735745375837d5b8522. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWFX2437599.