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 0x1e5c85b5fd8028019e8fd342f72d8f3713cafc8ece1351540f1c81e011b02408. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6bd50770-c73c-4262-9316-84117b76e58f.json and https://artists.proofprofile.net/proofs/artist/6bd50770-c73c-4262-9316-84117b76e58f.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 0xf6104e95adea2694f89740820c20769402d8700859dd927bafe3a56d192331e6. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USXQS2025383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb08525340f837387f620902f42d7ad5680de6eb8d8989b24425dbfb5f11f170. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USRC11803780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa95c71a9b28452449e2358f53576c4b4b74b04e1fdb0c9334806c21f043eb6cb. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11803781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36001450b4dc6e010e71fce767b20d304a8a3d9c5a3e6c252f7971a9cfe2a3fe. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/USRC11803782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6c890996a6c8aa7a5ac9eab6e4333782bea23da974fbb2d203d3ec1de4e6e53. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11803783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be384f6e4d0eee86cce1f7b05e3dd275b5f850c13066b15ac0387cd0aa446f7. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/USRC11803784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b23bffca5a36d4863672a402516fd5ff251557da09ffbbbcc090d389e75683. Chain 2 (Bitcoin): anchored in block 960355 (2026-07-31T05:49:18Z), 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/USRC11803785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8553a5b8ac60c7128d31be573462cca4c4f43bf4b445a25e7a84b4caa249c3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11803674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf70114aa2c2eab21f394f17c4ac4c9ffa1972fadbd949ca1df38e3c8b196084d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11803786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b72f8bf4b6bd72c630554df44c51ff4e72389a69a5b608954bd2125f6534a1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11803787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fdc3d265bb2f45109d95364830a1f536222b34a1a515c4b12100e8e7b354aa. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USRC11802482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1889ad5940ae040a6d86e49e6d4be6959217ad58f75332ca9457e71e24adc1f8. 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/USRC11802484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf469b305c9bc7708fcd2738a3e64cf0b0302d0141a2a6aab9eec6f8ff69c237b. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USRC11802602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfb9f4b437ec1de3143cc1bebf3beeb6c46ba1bf94a39dcbe8d028f9bd2acb1. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/USRC11802604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fb07ff4fba5f29f346b2cd5e854e8faf7bfba8fffbb46a1bc6467aadb441de. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USRC11802606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69fc656d3986515d9511d161b4431c2e724822c2b20f8bafc96eabdeba0adbc6. 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/TCACT1644480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1aecca3ff31c4ea296c03bed18581268a053f9ee61e91130b909d19b4e4c96. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USRC11802608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25093f40dd89085b7458472a24fb7ca9aac5415a8e1e5b44d048977f78059b7c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USRC11803931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1889ad5940ae040a6d86e49e6d4be6959217ad58f75332ca9457e71e24adc1f8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USRC11802484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbec1b053a4b5b3e5223a47cb8ae7626de5361019c94c4e599fd2d16cf5f912. 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/USXQS2439615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ef80b374b1461aa6f48084b978afe194327b97607969f5fbe079a607823420. 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/USXQS2439616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d32d00a1c73c81c393cba12808631c541d0b0b2d86f76b8bc49c0f1c372c11a. 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/USXQS2439617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf819aaab4ad4926b863def56090a837107d4061a3ab1188717994db2f9a394b6. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USXQS2439618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95ab83a0471d0ab2c36c64810fe7e01cc6d24acda940f72e72cf53fb5820c3d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USXQS2439619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f897d8d0e9bb846037e8ef4606794965a8601b6e382defb0d46e9afa1c8646. 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/USXQS2439620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ae318b5e1f11b2ec0380aaf537232146eb5135990bfe01b8e896757ecfb6d. 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/USXQS2439621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac58a87581fa8b2bad0c3a9b371005bd8b912fe4b1439e4a211f2d103a0d7c9. 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/USXQS2439622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d3e5f12c077ad4fe94abf5535dcc325fb7f4061d80f493d64ed95913c35c6f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USXQS2439623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0793fe7eab6826c3830dc6d7f7f2885b74ec5df92298fa4863ee480f3042e8f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USXQS2439624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4277a55a8c27678947b945a1d6ee9a3dd04e1554434e776293e78b23332b5361. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USXQS2439625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322030030175c2930c29ad2eef160de57e00b7400788e52c5adc0f09ef611c71. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USXQS2439626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f434e448492bf92ebc22c0a8b4ac36c27d6e48564e62c2e0e5aa8be97a0d06. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USXQS2439627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ad0548f4b1abfea9c9dd75d695eff4f1ad84585b09d6ad29551b7dcd4c3dde. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USXQS2439628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67e7b7cbfad8c23d6264699612bc5dc66e3876095858c38206a77b2b4b1c6082. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USXQS2439629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632f1dfddfa2a761f85db10c4c18c7c86b70166823544cc5e50689afdb6dfe4e. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USXQS2439630.