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 0x457c7a7948866d9d67398cd6b952cf7411bd4e3868ad5c77367d2a4429f0973b. 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/9e5f64cd-0312-4f35-b0eb-c9525a95ee84.json and https://artists.proofprofile.net/proofs/artist/9e5f64cd-0312-4f35-b0eb-c9525a95ee84.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 0x1b76ed8ba840d4a70147eea100b48e3a58ea37a6b3b0dd568bafea602b8e7e0d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZK6J2477322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7cb2cf0b74910726fa3dde51592dea2aa3e0ebbc7c147f8825307cd18ece01. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:20Z), 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/QZTBA2495346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f784a72d5913a1d8fb86724a2541480edf70aad64e8502e7578c28c3262976. 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/QZZ4J2401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd6087ac6a18a2a08d81cc2cfd32d0621f75cfecddf801443c30021e60f5d80. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZWFU2433435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00048709c1475e958a671e20687232aafda7df80abb638cfb07825cfb7ccb06. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZJG52504042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91f5dc4c871f819267d521c3b3753b9d496dd079be596a7f96445ec2d95f2c0. 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/QZZ4J2401723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e336e4bbdab9d3a0e25141812a2cad90e6a0f34f849dbd20317e180120c506. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZZ4J2401997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04623f4fad297262a62e5eb223571357c12fba74fa1b5ae935863be5df61877d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:46:26Z), 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/QZZ4J2401998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92bdb81f7635739a2fc84e1313e0bfe8057bf5af50029487a655d76297ecbee8. 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/QZZ4J2401878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9622175415cef8e880710988ac081115a5d299ed679c8da3f1993719d871b2ca. 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/QZNMY2464562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d41f304d5922de9752d20dd8232c8e45253e359968638d9a0736721e20dc12. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:58:11Z), 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/QZZ4J2401735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9de2e15b96b9467cd5a9383463fee7f6e904a1bb856a8cfd5f22e827e2abef. 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/QZZ4J2401879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aef6d383a7123ed4de89ea91fb3b080a9c0055cd088d42c0963c6b4ad0c44b3. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZZ4J2401722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce28f601a7ad21862afe53059a73987420f3f202675928fc543b8a771c331ec. 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/QZZ4J2401844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x935bd4466843e8572739feb4bce66f3882a9330b8256a8510c971f54b7d21ffb. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QZZ4J2402111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dee740cd6d9f71393b33e07f3e6b9a74d404f3e76fd34eec04fef2de1795bb. 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/QZZ4J2502148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x735caa1605f9f01dbcbbad49ff1a3aeaa1ee766b2462067df462d880639bab80. 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/QZZ4J2502149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x552cf16ae0d1871ee1078fdf3910d386ad8e381c2245658a71995f269731901b. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:54Z), 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/QZZ4J2502150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2f9cf8ba4ff715e5c8e1d6879c6677a5a246df8835d95d87e200e1f19e33cf. 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/QZZ4J2502151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb329f68ae3c7eb3e5ffe2ac8fab86242426d43f9d3e52a5a3f882cfe978c760. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZZ4J2502152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812ca7ed03dfd4037014bc87849b2c5f3d35fd9521917ee63ce3555f29e8236c. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QZZ4J2502153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe430b68d8ce01819a561f83ba0dd23bec7e22454dd894f45de878299ce4315b8. 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/QZZ4J2502154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd785c73d967effaeefedbfbd7c1c0d33baef86d854bd43f4fa520fe1a9182935. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZZ4J2502155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dd70f28217630681aa9f96319628400eeca8da5d6527b5a87d4c413b7ebd1f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZZ4J2502156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82cd529afe887a679ee4f856f45a5b30d04175a95e2c56af42b91579c8fb478c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZZ4J2502157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc00048709c1475e958a671e20687232aafda7df80abb638cfb07825cfb7ccb06. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZJG52504042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a144e39032f422d8e240af058eb8ad0c9cb9b0ef8dddc5ea76c9f01d90781. 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/QZZ4J2502367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f784a72d5913a1d8fb86724a2541480edf70aad64e8502e7578c28c3262976. 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/QZZ4J2401720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e51c0534398b88ff5459a43f2e8f15e9966b067cf8f2b7c1f490edc2e8499b. Chain 2 (Bitcoin): anchored in block 958865 (2026-07-20T13:08:30Z), 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/QZNMX2476806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2776d4256f2a754bdb329c7386e091430274ae5ba8c79cc339dfeb52f279ab39. 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/QZZ4J2502370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67fc4bd1136bc36425f265abee10a0a96e67b1ed7a56334269b82a6a40c0dc5. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZZ4J2502371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c640a0ff896c1cf98e0dcd2a8d545cf082bb6397e4437b1fd9fdec737bf961b. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZZ4J2502518.