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 0x35c9bd1e46a4b7e1089504f70d6e8986256b5879fcf8da78b6418d5656770c7e. 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/0cb210e8-f72b-4b01-aaa2-94fba47b62d6.json and https://artists.proofprofile.net/proofs/artist/0cb210e8-f72b-4b01-aaa2-94fba47b62d6.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 0xba847765588224a86cee619a0a2aeae6078fc7f7b202b996e23b01f8209cbf72. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKTY22000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382b74908cd19626fedcd2d553653b2d9cc7c14f1508f91e15120c63908b375a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/UKTY22000024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba847765588224a86cee619a0a2aeae6078fc7f7b202b996e23b01f8209cbf72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKTY22000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c66c537eae1b4ce15931c7eb20074db8aeb687c09442aa1743789cf72a7cdf5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBMA22097711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5f92130336f1f07aae606ef46d9b37fd57339fc26ab60b7ea426c82fd208c1. 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/GBMA22097714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4240df2433e4da251b86a0d79d06982481cd5f28aefd89e7c304358243d28224. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMA21948450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebe8b77df49a463955418122f2a8a0d43c85139d59cb83b582f69b540fd7db. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GB2DY1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7857dd5043e6b8c65b4d56bea54f16a5bcfff25af32530ff93d57b3f78e531fb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBMA21948467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7573fa8694fb5521016ea9de3c69112d98be6af2e4e5a862250e40983e8a7d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA21948483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b5ff6933ee5d679433c79cad8c3a88eb8155c4c2717d211b408aad5374387e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/UKTY22000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ab22ed720bc567a868b5941cc343a190bb81dca5ccadd12928f3a64f3519e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAEO1999356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b03798cb27891e924e3d0fda9ad72968bb363f27a2256cbe737c1d48c60fe3. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBMA21991142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ebe8b77df49a463955418122f2a8a0d43c85139d59cb83b582f69b540fd7db. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB2DY1900045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e0bbb0523fa411294d11d9743aedd27a7cb88027d4f8d4bb12c059986ba292. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBMA21914274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9b521225ab566db9228b6abb6303beafc0fbd1e3749b545476423cd52d123. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBMA21853669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1cfd1990f00693c7f34fd824dba2feebee8a8b9c3e4e2b54a17e90434bd80. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCADY1820033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ab02ae3cc49541a824bbf2ec65c3f01b4de62b6ee74a7d484cf72fa2846cc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCADY1820623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a9b521225ab566db9228b6abb6303beafc0fbd1e3749b545476423cd52d123. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBMA21853669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d137b43877acc3e3b75837a2617ff293ca85828d7f21c53660155f6056d85f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZTB92229823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f849cfd28a2aaf1742a88869113361c12fcd3f86738a57e74b4a396cbda6cd. 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/GBCUW1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f849cfd28a2aaf1742a88869113361c12fcd3f86738a57e74b4a396cbda6cd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBCUW1900055.