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 0x6ed2f0eb659b179b1674174e908547fa52b372b9317e22643ca91c342900d845. 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/bf2c586c-2cf7-469d-a9e5-5b41c9c2fbae.json and https://artists.proofprofile.net/proofs/artist/bf2c586c-2cf7-469d-a9e5-5b41c9c2fbae.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 0x4d80c2e852df386323920f5c9cbd3f0d5a335f01b2969c332a8ab8aa08074ecc. 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/FR96X2231295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ad977c941dcafd9553157437ddfd324639d24dbea0998160ca330ae8d85cda. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR96X2231296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330744ef1a6ed01c824c162889c003049428792b335353073e34f9595f71ef3c. 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/FR96X2231297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe29331adba59d4e961d44d50407d076124964977e6eb05e2890a357a84f8f834. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRX202295024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f11d77c57252c1792e9d33b7d16b370b9721a7b6e9bbf6d371fdbffb844d27. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FRX202295025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc663619c0a3fa55f8b37111717542cde170eeaf4d24a5028cbb1789a3a94fc. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR96X2215183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dacf69e5d06c79d9fae8e1ccea12737089c4b474d9bd8badde054b581227d09. 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/FR96X2215184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b928fb6dc5173935cbb5149b449dcf98bf44f68efafec97c75e51dff372eba7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR59R2236847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3e92ef489821b18fa6daff1229aa882d0f8e6e19ca7169233b00c89eb5db89. 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/FR59R2236848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ae27647e731da26bdd9cd0d119fe7b751ba46cfd4c204dc4380e12cacd95627. 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/FR59R2236849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d640f6cc655d1f175ad69dd2b4e2d7e8c44bcdf10f6912603d431b2022d038. 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/FR2X42264610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186dbe8efabacd1df6f3f744441e806be4bbcddddbb7a5c3d05074876a32555c. 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/FR2X42264611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefa7cfe7011efa835f0cbc9e7217d604434353914533ae16e4e7ccb841a443a. 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/FR2X42264645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e876dcadcdcc30fc1b23bcc5c60414c4162be5a1482b9b984094a6deb7191cf. 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/FR2X42264646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f75dec76637f500bc8a98b5f6d8e2d2a2034c40644ca51764cd8dd36e73a3b8. 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/FR2X42263431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d8be6174e235982ead9cfe65d685720d530737f9c056905b7f83639be96fbc2. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FR2X42263432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c9ff7ded9896c8505a55aa2679145cda30f1087157dae78efdac537c858fcd. 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/FR2X42261346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x159a5c22be57a600e14b7facdb5d46239b3adec1a55e9c0c4257be68969f6897. 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/FR2X42261347.