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 0x0ac8d6e5935c4e33bb6059db5553528817e3a2ed144c88be2a99f564605419ae. 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/f4704bf5-8495-401c-9b87-f291614c7f3b.json and https://artists.proofprofile.net/proofs/artist/f4704bf5-8495-401c-9b87-f291614c7f3b.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 0x59604227de68c6e0ce7935a4052840610b81bc00cfbf71a8ccd216eb6c592032. 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/QZ5FN2339962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60a20255ede2ee019e697e9f7109227bd9b433a17933e0a6d8134bdf1a43f39. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:58:56Z), 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/QZ5FN2364179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a20ac5dfde1226705ae74dfd1c7c04f01e04e33d972f530f5a8e3b0b4dca8f. 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/GXBDT2361405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53789dc26fca7fa6810fb89a6bd7e60ae981319a70cde545c36dfcd238bea1e5. 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/GX8LE2483092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e0920219d9d5b29254c74fecfe0feeef64649f179be72629d2cb6fe0ac059f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GX5MY2481892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43307b4b22331f215e0505696e38bd49dde5c59c81d88ae784301f7477f58f3e. 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/GX38U2573358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf4612f748322ec2e5567d319fcfe7e17f4537dc367e81b9a59c1d72dde17f73. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/GXESV2528755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc641728d745e847bfa12d4d75ba3e9a84ac377f4e2cb0b17af5354e47eb5fc45. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/GXBDT2539568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ea0629eb154eaa26d1517d8325b5e0d1ee79b94720e683c0ce6c7bd0fbc2b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZMHK2235672.