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 0xe106206d973244c6e1dcd21e392e5755935c44f33fe20e34e95fd16df8ea2769. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/307306eb-c45c-4874-832d-568758640220.json and https://artists.proofprofile.net/proofs/artist/307306eb-c45c-4874-832d-568758640220.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 0x97c69cd7aba6c904e53c5101c99f3c80dfbda734a0b4a4642fdbd85e9347ac17. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAFF2035339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23ad26815fa8535b1f56362b426a39ba9bf0639e3799e18669f4c32172c648f3. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAFY2133560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1b08a38397762b2f48310a4423f270a873f23f30dac838b9ecde0171111752. 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/TCAGH2218381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b3bd527338a2b33dd435433631a95e0cd4e7dfd8629bea144e012151d04621. 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/IELOI2265698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b2c701bdb7a3630242a07715039a25836d447281a112aa5a5c5d07d2e2ef8c. 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/TCAIG2433898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd57b5eeda4ca600ee3db3480a3718ff5ec6d8b0e3ee0f7744bfe1745539495c5. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:14Z), 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/TCAIR2434936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76c401bae7696201a14f47647e299cd7a52c1a288ddc939afe1d0022f1df5d6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/TCAIS2421794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e9566a6223eb93d15cb0f0d0b7a3295ffc975683ed7944ae12972fcf55bff53. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAJB2447488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe168c79da4d512a6072d0e7a2ccea6d113b3610da968c7f8dfb5885c210c775c. 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/TCAJB2456515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c03e0750d1ad7a3ed1b40236457ce0ed9114e45fe53e1c465c23bc87d82f3e. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAJP2501159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85dc5971dd04cabb295d4021dc923fe712267f8c6a2d41e740f29c8d73a1019c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/TCAJS2595873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe99cbc548f1f3451a91445a4d94b213ecbda7c1f7c0956c34d0c862db77117d. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/TCAJZ2534440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca9314879387196ef15517a5f1d526e3239127789cc3a16ca81a2308f4272d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QT65Y2529074.