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 0x498a6c83beba4887bee2377c60b23e2d98e63143843b858915ac1049fb1bb752. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4834d5a7-9e40-4b4f-b0dd-9a7d2bbac82d.json and https://artists.proofprofile.net/proofs/artist/4834d5a7-9e40-4b4f-b0dd-9a7d2bbac82d.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 0xe59bc26e70d176f81e7c4c75efcb588d21397a23bf8c542fd24cd274e805895c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/USA2P2340347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dff7b2b7e8c45dc37610f5005d926450621dc798f8e57253cfdc5de23971a8c. 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/USA2P2345297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9132ac03b1b9e3bc271e18548a591b5c7a2bde95ddddc6b5f6acfef2436dff67. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:59:28Z), 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/USA2P2345299.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358dc4a4d2ecb7a7dcab31d971b3593ba382ead74ae9d18526ead7f88d238d7b. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/USA2P2454567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6579801b80d6a1d8e5d3fb9b2e4128e781e4459acc3900456a240a4a99679a9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USA2P2454568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbe1263aa3c2436c16eedef9e8cf219cba422dce9c30fe8d85ba80eeb269de3. 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/USA2P2454569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc298ca1cfcfe251127b8650e749c04e735b78fff27165f237a3f83d79ea7b2. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:20Z), 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/USA2P2454570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b8ccfc09d2a4e7ab3c202f8097bd6e5bd384bf8ee378fbad29c38e7aec5a55. 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/USA2P2454571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd26784dc80590a943e5d661d3da0e51e30de3555f488ad294a6cf4e66dd72a99. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USA2P2454572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f107b23cf8b63177ec575b5711c2995583ebea18442aa986ddfb4553f90da2. 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/USA2P2454573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dab4c215b3bab5e3384f042a710911845564b79a9181f792822c0628d64b90. 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/JPR502512206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82dab4c215b3bab5e3384f042a710911845564b79a9181f792822c0628d64b90. 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/JPR502512206.