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 0x3458a26af30dc639714b386537acae3b7075c4125663a83a116459906269d5d6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3e50374-1f3b-45b0-a7cb-d01dca1aace2.json and https://artists.proofprofile.net/proofs/artist/e3e50374-1f3b-45b0-a7cb-d01dca1aace2.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 0xed67e8ca60debe81ad97e346f0dc65c0303b89383cde8097fbbd63b2c18fa89c. 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/QZDA61905609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4909679a5bfe1e4269cb010c3b5b24077e463af795e5c3fcae58cb489e99968b. 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/QZK6N1951741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f38f8836b2c6d76c50ad59ee0fcadcf2f284f77a242f1c90b0dd54c6eaac1f. 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/QZFZ52089496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bc8c22498bcd437b8b3e63d4cd9cfbd5265dc9c9a3f020077c7a8f37e47729. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:16:39Z), 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/QZNWQ2266231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f4581ebca415dc8b4dae9dbd18aea24009afa91400a15950b8c3b3c84a2800. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZTAU2222473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f68db96c33b0f4c1969f2a6866c102dd91b6472e7e39fa5863110bc64533730. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZHN42309537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea5d9dd10c0e9bc0a0f8cd6320d0099bdb35804027ec47de08b1a00e820cee8f. 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/QZWFP2342562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1142b759a72f027160aea9621cab770c6a19c036cb14c56f9f99955b58574809. 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/QZMEP2434343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d0fa370ce650c4c1c1ea894bf5d4f871bbcfa5cbc60e120c2ed1d4ab80de79d. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZTB22459643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80daf9bcb9f5b04ba033775ecdc1878c3199ee8fbb1cd6560396b1d9bf95bd82. 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/QZZ7Q2490562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610147b0971e979cff8180d4dabd05ef94524994ce722205fa6d2f8d5905c5a7. 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/QZES72538411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631c56d0b1c65968152e1f8f5b79c72eeb29f53e2bc1035d86b20f2faca393a. 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/QZES72538412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f8d6180bb50a4c3295e71dfc5b283fd21883f92397c226300a77408cc24979. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZES72538413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e5195794db77b7a88271426bf5144c22ea152a1027a86ca9dbb5b7dac4f3d15. 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/QZES72538414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f437ed14a83e7f88a1cd4e8c0db303942da858834a1af0794964ae0f6770a0. 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/QZES72538415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc548b3166d9cf757c7fdb1eeec23f7e0695b37c33575a91cf451466971a71589. 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/QZES72538416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af1924446e9a3128a2008c908e3829b7a63b3504ebdeddd53b51ee3810a6a4e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZES72538417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc224cddd21f7962eb5364b107eb122360b8b346f94e643268263a3b5975bf06. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:41:39Z), 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/QZPLS2538429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0baf9149e1a0fe48ed0b47c3068802f49407549bcc8b4431866c1d7298784cd0. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3F22533379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a3571adcf4752e8c7f70de7a51fa6bda9c93d28bc2aae133113939cd2d8f25. 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/QT3F92587810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa019b5e6864a3b48a22d7bb6d0c8ef575dda28e63d9ddb9ecf38db179b3217. 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/QT3FD2570083.