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 0xe35edba9bac118d92f2ca8617a1ae1140a082442ac86f6102fa508de641ca3dd. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a21864a7-1c8a-42f5-b8d4-9fe2df5a6eeb.json and https://artists.proofprofile.net/proofs/artist/a21864a7-1c8a-42f5-b8d4-9fe2df5a6eeb.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 0x1a60e084d9241a8272eb7a162c03bb42b8aed9816b83aed4862591c266a5681c. 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/TCAFZ2128079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c7d0b1e238e24d344300f82383cb79369e79ebc11d58ffe4fea2877353164a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:35:55Z), 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/TCAGA2250916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c86ebc9b02b7fd65f6f851e7c463d138baaa7979cf88cd2ecd497f5ac762081. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCAGT2398470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed9dd89641fe5411f1bd487314a3b1dfd0e766fa67356f7bea7e2770768b33c. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:39:22Z), 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/TCAHF2311393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000d43c5d0af7e9f0c8c2a341cfe5b41ef9d807341743872ed6d5579b6ebf350. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAFZ2282919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8410e2dc72c6b01d20dd5837440f668b63bf6be3d6d2681601eef9bd3b64250d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:27:59Z), 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/TCAIT2421062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d04fd0fd15b758c896ecfb2079c287327872fc5123a14ed984c0a722674c3e9. 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/TCAIS2421157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf59adcb9d4653ca204ce16fc7edce8c58754f9ebd40283c4419ff17683b2fb6a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAIG2483980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f7338d337cb159aeeed3f56f07bccb4ab9fbb4875c03c6c61b2a82cb5e2da2. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:04:02Z), 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/TCAIS2421442.