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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0418516819d7bbdeb20dfdd2ce862b2bc2ec6258b6ca2400cde808168eb57a2a. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/52b9f3c8-6e9c-4bef-a542-ef47507423c0.json and https://artists.proofprofile.net/proofs/artist/52b9f3c8-6e9c-4bef-a542-ef47507423c0.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6438ab1065502cfa2b96c53dc76bd627a75945fec4773d4abf8ebf9981d831c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CACWV2585486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66d3b60c5d1c7c1917cb08691e352799031432cde7aa4282c23f96bfae186b7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CACWV2592628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286e648b4d68abf204a545ad68b1122b39cba7aebfe93301320ce957e7df5773. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/CACWV2592631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20fe669430ced93bb39743d2d19620a26d07b54e1967a2798f662e543b6c8b9c. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T13:52:01Z), 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/CACWV2592632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbd22e0dcfa754f625cfafb5b3f7e8c2ae05d549a489c1991e1df3347fc46f3b. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/CACWV2592633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d7c0e324391574dad8e30b30393e013c1ccdd7566ff2a6e9647e11b9e49baaa. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/CACWV2592634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f81eef0e539768831294be8ed78fafc52f4616713981fb919c0027e1debe07. 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/CACWV2592635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f4315b5748cad82c6c83f7c11b4d1bb37bbc52dd767d4b3b2f37f4e846304. 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/CACWV2592637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aef69a258c3b6360bdcfa792b50623b54011b8dc8cf0a14df02cff2094af27. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/CACWV2592638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f864b23d576bdef576f823382a38def25e584c2bb90bf72e1f35868be0aa6a. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/CACWV2592639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082fc1c0d43b6f3d18b2bafb0811499f5a03a0f3f3d26e42632b7868628fad5f. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/CACWV2592640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa243e434219beb5463d648a17391573f503d683de6e79e217f67991009a7bd47. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/CAENV2504583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfc31e84b41f2d3f6eb4ef49a12d998277daa12abe5ce25332005a101e1ef8c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CAENV2504586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79b448063028560e961464d4a97116c5081ce180961d58d54dc2db4848dd7583. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAENV2504587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1538710305fe8cbda1e25cc6e564095ca3aae3df637780c20cb5f6bf21c8cd33. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CAENV2504588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf39bd74df9a2594fcf617539319837e73dd282442b3ca4ad44ad7bb2eedb2fcd. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CAENV2504589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x541a5f63eb93b3350ffe3670a34788dffa5a68b91222e8fbd8dbefc04c26ee23. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAENV2504590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057737148054751007d55164e9741eada4e06b94285e5896a281acafdad121d7. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/CAENV2504591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bf5139e00fa351c8ecd45939c91a8d77ca18db0e70e213b055cfbdbe94adee. 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/CAENV2504592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe48d3e95e17887e774865868f456c518fa6f2e53f7c0667fa12abdf1157c35. 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/CAENV2504593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6d2867aba6e1e50f2e689573285133f8df6aa3dc5ba4b174ec17f8056b4be7. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CAENV2504594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e09a7c46d9717bc703aeddbd10d322a6af3bc83701305f8375b07388bd8323. 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/CAENV2504596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb2d2593fa72ce29040691b4a7ad1fa5c8938c1a95a42f138ad841e518c6a7d. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CAENV2504598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2baa297dbd781a40e02d547397fe959caee60669610fe5bf1339ca431ec2a70. 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/CAENV2504599.