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 0x1662762dc852c7d377d287125d1269c66ba742d66a65e95e7e624f595ba0eb09. 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/1beb8c46-7753-4941-8e54-511832ca3ac7.json and https://artists.proofprofile.net/proofs/artist/1beb8c46-7753-4941-8e54-511832ca3ac7.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 0x2dfd64d4357c622d7e06e2e53cd75171ab15024773dae9f500d2c5f64d27acb0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2352671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6047f3ffa38f2fa6ee9eda70b6a131b4b808aeb231844ed625cc46c65ff26d93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2480118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x328dc1ede94d3dab207fd0dd7f2bf522a9228b8fae76f1e5648d9aed50cf0b9d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2417471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x782d4deab8b87f28b126dbffcef85a701e3355940ee6688430f06e3ea2434303. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2415828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d80d7939eb00eb4768eb4bebebb61045157318f4928166c1f925c2fa30683a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CA5KR2134859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daab936e743f0a203e3c8cb5ec0614f0c60ebf96784553524d2dd9414be8d78. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2371117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfaba5c4aa99a28b0e4ee316e612b286a42a32b38b5d57a13452f230d5ff19d9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2134858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b239a97dcbdcd3cd6fe29f7901b8709b5ec79853ef20fc0180814f67b7ddcc. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2353237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1bea082b7b7208b80ca75e60e682b6787cac3856dafcea9ddf5a4b039029620. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2361723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbefd3b61a0603496322fed45dbd8a27a095fa1dfecc1d760d420a73617079a36. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2350537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xada6d0ac6a938a15b27517ee39f0731d0450380e8f05c5984833337e6f72b5dd. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA5KR2328327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba03b281cecfe6e1729fda1b3c47356b110783a83957a0dc5651efec6b7adbd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2321502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29b49e56cbfc08f9c243972e0c2474df33830a9e53d902c157a7c02d9603874. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2318055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e2004357c2dd77fdc1e5752d92f6f37b8a239178ca544358278b656d061ca6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2285648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fd3245d275024f0885331e8ed748824c4199c0a33be2d9eea2cc1839f0c2f8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/CA5KR2286748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddeb45d79a49fee6b4bc87e73f7754d75765b45570bd6ec239603eeff65937d3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ITLCJ2100233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7863572ce751ff3b79dc6be534d38e113c4642378937be424f810579fa606c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2273447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3046a8bbf1548b3ff7c7d4dad71235f643096d1a015ef8a0dbbda147c35d2924. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/MXF012200300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7d3df9af117f584537d1516bacd73488e2b44f7a04cf1865cd40c71e44edfb. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2261466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eceab5f3bef0340fc6e1535c15b74ecc8186529b9703a022bd15ce64ebb6dbf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/CA5KR2261467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f13bcea68612364a4764723786a73a28e3ab0a8b8837b54c3d436a2bf44be1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2259293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4078ebbc7d55e150d7e24d1056ccb3e46913674b75f0f6745967075de122ba5c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR2214207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80b6cc28909639db8d2de1c4a705e48ba6ecfd9a9b9ddd4a278eb4c49086260. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CA5KR0039196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a368b91da1dcc222e118b0296c7d198e27b757b9e81925fa035bc1cdfd46817. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBWUL2184336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc545b6ea57810a72f20d6afc1c4296c946fa4355a2b6482e05765cd14a8830b6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/CA5KR2187213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x592d181e2bd1e298d55799aefa9490dcce971824ebb43d911ada6cb062ca482c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/CA5KR2181871.