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 0x906378e24aedec53e8e426d5d87d4593538a5046e2564495039582cbf9150062. 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/38943705-79f7-40f1-9d1a-4e979d060156.json and https://artists.proofprofile.net/proofs/artist/38943705-79f7-40f1-9d1a-4e979d060156.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 0xf74084630176d6e96d08e520422195f11c0798f8cd8f7fb75a4e49345cdb7c1f. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/CA1370559318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05320feb372736504c65738bf0fa2232828e2cf19b285c78a7c42f1d7624119. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/CA1370559319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd25c4de407a5aaa01cff4cc140fd04a48fbf7ecdd18ccb7fecd7922d715edba7. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/CA1370559320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85575951fc743eae6a0a14673265339c5631d33c13d4c553ea5436fab80dad9f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/CA1370559326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333516bdd2bb084249af8d7e6fbcf739d9e4999b5b41eeffcf7f316828665a6b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CA1370568578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5267e31172c9e84cd49f787fe598380b82a1d17b1442fcc5fe978fde0a27f1b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA1370568583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fcb82fa7c595c5b5e0606e7b63e8044580aac533c89f27904296caa71975d8a. 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/CA1370568588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72f167b42fab52f347b89f66f03c594e6a514f5154b92cd48490ea186cdeb65d. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/CA9TN1600009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286d26ea8a25d7bc1a9b9651bc3c3bdac5aad2f8a17748e25cb435ed87978418. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/CA9TN1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74c22b4e2dc7f8edc363c513a968ca8996e34454645dd5ba4874fdd1ee205c65. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:05:50Z), 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/CA9TN2100005.
Action Poems: Children's Rhymes by Nancy Kopman