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 0xd44cb403b859d6e0bc0a86673bc4ca67cdff716274b17015c6221af04c9bf856. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2d520dd-c47f-4d97-86a4-417af0d9f401.json and https://artists.proofprofile.net/proofs/artist/f2d520dd-c47f-4d97-86a4-417af0d9f401.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 0x8adf88ecb78032de63ebc142a15b5f953f2ed5a9fb7500968daa76baf488ee06. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:56:09Z), 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/QZWFW2546992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2229129b49c340491785f67c6c48957f406dd6524df9b87574d3ec04fa844c9. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFW2546993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c17426409f85c6e53f7629271c126f65cafcfc9ab44e7dd45f6c936ea49efff. 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/QZWFW2546994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b19ff232aa4a4eaee2eb5e04a24afeba026bc2b574765a2366c543d93cf51e. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZWFW2546995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2c90d74931ad461c7324314fa290ed0095fe90c986866a37cbf4e4f02ac72a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:12:47Z), 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/QZWFW2546996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x962a5dd1c1a54f48c87102eb73b137712ae16f14b79c34ddb569adeddae01bb2. 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/QZWFW2546997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6c3f1d91e155817274aab32d592414b22a0852fa58c1a0a305c34040a57a69. 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/QZWFW2546998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d4715fd40744255f065a27d30d0984cf1a2d27eac0fd0ed0ddb23d5da7cf06c. 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/QZWFW2546999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2589aa8eaeb669301c878db9ba1ff7a36b4c0099753bbd5cc2d18c9fec63ea5. 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/QZWFW2547000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaddf8c371d63ac7d6a5c29286a35492da88b898627239931a83e2d4f7dc9852d. 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/QZWFW2547001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf506537003e1006b4aa77882743d164c1c54bf63aea443625ea014a8cf8019e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWFW2547002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126958c7c789f71c9de04667045c65d2c9b1f1456b19dfcb4096c9f7ec20cb2f. 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/QZWFW2547003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf965cffa14d0a8ab75ada05444fd27b66983de61433ebcece84aa1d6ceef94d1. 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/QZWFW2547004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33bbd36591c71bb1335fdcf7d3973b54edbf3c916fdb6037e7b6a73b191eab71. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:26:01Z), 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/QZWFW2547005.