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 0x01da0de4bb61f9fe686e5de3445e17e37a6565c544930bce053034f62684d642. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca5bb9d1-62ac-4836-94af-d32537f7e701.json and https://artists.proofprofile.net/proofs/artist/ca5bb9d1-62ac-4836-94af-d32537f7e701.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 0x10ba13b6e89c21904cff3985d9fac28662f14e8381af7f8a9b1ff87e91d81ad2. 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/QZDA82333221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b4f595d0a3b5eefac816a0bdede208542e17bbb6962effcf2b5afcfed083d0. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:59:39Z), 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/QZTAW2342211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc156a79cd90ec05ac1a329e752fb1c87379c025c82be72b088bfeefffd9bd016. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:29:37Z), 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/QZRP52438480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eaad0aa1dceb591830a0689031ff9b15716017595c42d73ac0458d84d0a342c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZRP52438482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bf34b27dea8e73b944878f22752e8993fc7ad9c2166e0eaf3b9e923d624b81. Chain 2 (Bitcoin): anchored in block 958691 (2026-07-19T07:19:31Z), 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/QZRP52438484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415c1465819165f417669102816d3f699424178858dcd6bf910300aa11b24d86. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZRP52438485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c45924f549d032f397646306b1da85b081e63d53772e456dd45bc9f77c967b. 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/QZRP52438487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e76e865322034f4737834e1e01bbda44fdc15ba25b6864345dcd14d0d338c59. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:56:23Z), 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/QZHNC2511641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4171ec387b103ae40bb6ca4fdafae3a5fb736a5ab3b872b9af60c49d69e0a37. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNC2511642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x934741ddddd7e7707e428404f58d7a8be436ae536d5e0388478641694c8ba3bf. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNC2511643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993e6fa69f1a4655b0f966b1a65ab1adbabba671e691f9a318d227d04b6c1893. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZHNC2511644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38723eb326ee429e5f746339a78b57112e69b65676abde74b27ea9a808265077. 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/QZZ7S2502374.