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 0x932ebbafdf8eb7de902b58f5a2557b8dbba63a6791b8cdea88e13dab3449045f. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62c5d800-5e38-4f3e-999d-7b2aedab52cd.json and https://artists.proofprofile.net/proofs/artist/62c5d800-5e38-4f3e-999d-7b2aedab52cd.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 0xca00c5be0b1aeb3fb7b4acd4b4c8e22f4658f463df09fdc5aefcb240f8f81c05. 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/MXF010700155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa9d0be011ff4bd4376bb5428d8bc511d4ef162101411ae5ec2f6c0a677f2910. 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/MXF010700157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa2c755ccb1dbbcf6a9f1a2b80b021292030114e78e5c02c206e555310626e2. 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/MXF010700158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2dfcf13bad29c50a58b06d62751e46c5d19d76811264ebeeeb7fe2aa666309. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/MXF010700159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aeaa3284aa932db0e598ec933327db95f3c006774d3877e659b6827ddcb25b4. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-19T23:47:07Z), 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/TCADT1862232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a25b4756b06a59e080b79f2c0519d030514d2fcb57c8e6d5d3dcc26eee4f61c. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/TCADU1807567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d98394357f9746c74f460b0a4c65fd9b96493d01b988ab7573ed1ca7dd48cb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCADU1807592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2239ad5d383b22cbfd58ede04c5888cc295c4674c17270cdc4c3dea85fa0bebb. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCADU1807593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25a70125f74b2cb1d25969852860de9a02919a2cb3329faf965462f7ee3045c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:09:01Z), 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/TCADU1807646.