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 0x3f1605863f4bdbe4b9e91b0d9c953dd5d25dd1c81c1b2708a5dde34cfa88f0c2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8efe06ee-39d5-4feb-b5de-6704ba965b67.json and https://artists.proofprofile.net/proofs/artist/8efe06ee-39d5-4feb-b5de-6704ba965b67.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 0xef6a1bc84c3f5bc5850b64929038123fbfedb6b5bbe30a33e250dd624c9dd61f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/US25X1900758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dd13dcf09464790fb63d992602ac69ffc9fba001db5d8b181f2384e6ae25c9. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US25X1903429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x438552cb65162384c546dd9bf9cc974a67c28014858f52f8af6acad99fac8c9f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/US25X2002641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975beb5fb8838e0daf94a4ef432ee7f4f0fb2cc2993b795470bcacb682b9332e. 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/US25X2103706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6615a3c60800af55a5ae434279aa96a1e2ba61e82898d3656156ebbb9753fd9. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/US25X2103707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12792cf8a705250ef6cb38994c949fbea707d0ac10befa8aa9ce9ca0ae45823c. 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/US25X2103710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023451baaa1ef81f6a26e2f9046d36bf8f3066ad92bb5b78c0cb761e8ade0682. 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/US25X2300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecac6b795c594eb39acf28cfbf156d210d50cef13e48d4c1609da2742872c4f9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/GBMJG2320830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ebf3d07588a89815488899856815c2b0b01872f55d7b3e5bf10061a1501f7e. 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/GBWUL2418517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa552f486f1acd78f2c08a65310335f8975a6f1bb6cd42b14a21008889d234d48. 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/GBWUL2418546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x170e11d3043596a3700cb65e7d898dd2bb645800cd41e185a06d4aa330349435. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/GBWUL2418638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbce5b80eeaeaf990fa12b124c871fec88a1055c6aa7b12581ec3bf58a1e17d7. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GBWUL2418693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad44a466049e1adc1aebd646a93fa210d826c8c4552a391ea984be662d311ab. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GBWUL2418829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92419e55ae51824cc5d737ff32b6252212d2315180b77fcbcfdecb41b7119299. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/QZWV32433106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5740e1ba71e890a68e6a06ab8778a9c292944bc98129ccacd459812a18886e55. 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/QZWV32433107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a8c6921792fdd6f6e709bb60a57b8a619ea2c87e38ecdc3372affcae024b79a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:57Z), 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/QZWV32482452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b66e549b80e75cbd1b2c045fb21226fe992f2c80f51268f3ac4b80df9b9252. 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/USYBL2001173.