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 0x86512b6163dc68785f91e95686f9f37d39f5dd85443074ea1b637bdca3c5d818. 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/f546aa7c-dd3d-4a35-9156-7e465137e10a.json and https://artists.proofprofile.net/proofs/artist/f546aa7c-dd3d-4a35-9156-7e465137e10a.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 0x45d4deefde4353f8ce0948c1efa6486f5bb1ce12fdf6074a5e01da336145c09d. 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/QZNWZ2307973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa805d0fe3bddb646ddf9823b19377bbf04f75f8303f8204580c3de62f84c6588. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZTAY2336265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c66c6300abd513953005d7e28ecd260a79c505b07354b61a9ef6c537caef14. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:07:35Z), 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/QZTAY2336306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719ea7a11fa276ae05dffa8de435139f3ff28825f3469db89796b45cd15d49f. 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/QZK6N2466198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5719ea7a11fa276ae05dffa8de435139f3ff28825f3469db89796b45cd15d49f. 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/QZK6N2466198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644e054ca9434a5661ecdcf18f6e2e75d8140bec37074fc6d317d8d12b65fa91. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:08:06Z), 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/QZK6J2495386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106c8d9b002adc6ab70c668ce069f189ff8932d4834539af381f40035e8ee10b. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:50:54Z), 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/QZPLR2482755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24c0d978a1fc5542fc20b9bbda0206977fcc302d4d56afc2804c1167a6cc7d07. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTAZ2409927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18058010c585f25edb9f90cd8061c1d0a7c6c07127ee5f8cab62eedae5bee9d. 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/QZWFV2469065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2a0db3def2ed4e9d9d14d3157f3b904269b99d43662f14eff2081f1b032e7a. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZWFX2419331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf36a94982b70518f3035e2c1e6de6def853244471475d7f86c06394f994c0ecd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFX2415182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2d45d9d2bf33e8800a21477baf8439b66c673b19b5bac1ca0125728d0c720a. 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/QZZ7M2477827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc4e1063e2fca81911c618658afa80a2639bd41ea8774519b8e3c29fa171cd. 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/QZZ7X2435235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfc4e1063e2fca81911c618658afa80a2639bd41ea8774519b8e3c29fa171cd. 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/QZZ7X2435235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e969a5f3ec99a478e752abb5670782f9edbf73f004ae0b12fe93b6657da45f2. 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/QZZ7X2438154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c906b5f19f6eb592d5e4ba76046d7c4be1cfc158c1215f9decec8b63dd8b11d. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:34:43Z), 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/QZZ7X2435237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x324d2e452e21b49f07086606dfffd5d2ef0812d59818d6b080139bed46fdf625. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QT3EZ2436416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1127067574dfcb45c1c35340adf6615a8dff06da81d1bc6b3167eaf3f091295. 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/QZES62592699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e0c5cacbffbacaad17c09fe43ace5a19a7d33ef36d31c33a6bc4a395393feb. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:43:16Z), 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/QZES82578316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc607985f74ecea570ef08354158a13e3cf09e7f2d046207934915e195f449d03. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZHN32538593.