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 0x931ed820e8d7372badb056e3b5305c54c42d0b611281feec472c0d188a8feb3a. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ecbf3ff0-c2bc-4fd9-bdfd-f404c3314dc0.json and https://artists.proofprofile.net/proofs/artist/ecbf3ff0-c2bc-4fd9-bdfd-f404c3314dc0.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 0x1ce1468a298dda8174af2960f78dfd6aaeb089409fa198329ad02bed244c8f83. 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/UABG11600013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ddd24787c7308edd5e22169ca03497c823406eb4c308eba3c1008ff9dd9ef0. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/UABG11600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa52fd1e18d6e767c975b381f0511025a8e45e6f14031fc0a311aa54144110fd. 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/UABG11600018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fff3c9ef37599bae037fa22c5a401f0cb44a6d47c0010e26fdb2026474ff7c9. 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/UABG11600019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb472d2ec829fe8947f858e0ab84593c8ba767b9ebd73c3c671db3c2a809b311. 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/UABG11800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd87353d4e8156c5833b95fd5d05ea1d2fd06d3f1d1e65c30b245b3763b8436. 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/UABG11800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7663dcaa4de7c095019d5fb21bed68a3004c053c88a3eb677bc6511290928a. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/UABG11800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ff430edeffebbca418469b582e2c30ecb9555302256e9887cd2276d2f337b4. 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/UABG12000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6521093a8d29a2655f53199d7e4a98e1118eaf2af3754f2feb1bcbc9c440a642. 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/UABG12300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8234d5238f3b6ff1c899844c314a9513b9cfe0fd6a4d4bcac2090f939d53853d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:05:08Z), 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/UABG12500011.