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 0x7ff7e64dbc948b9ebcdd0aaa7bfb1e128391b5b8defd4061e326d4ce0af49eb6. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b16e8318-3d56-4e54-91d6-d08e14e65d1b.json and https://artists.proofprofile.net/proofs/artist/b16e8318-3d56-4e54-91d6-d08e14e65d1b.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 0x823e1caf70ddacc38044a7be50211699b46ef77874850c247d4543923f6a2ba0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/UKHF72000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268ccf1ced54f981c4ff7582db21bf96d6b689df15faa3d1e29fd709e89ce858. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/UKHF72000014.
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 0xb8ea07c0c9351cc734d357e15de83bad1ea906b4e9e428a7110ef1f687bf7650. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/UKHF72000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3f01dffcf96f419fac0ac10f6340438c7f4d774d7c9854230319712c08b748. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKHF72000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62203d0b2fad42e12f2dedbc84493f8f9077a6c46acfa0c7e42b72cad8443afe. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKHF72000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ebde801f85867e27c33b78db58b305e400a80763ac9a6d279f7b1d79ae30aa. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/UKHF72000020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8d74955374ea613c02470753fb1e6d287e1b57ccd6f15d3e772c1081f9688cf. 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/FR59R1866349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66093ff2253bba83d0967ecb7f675a5d07a263bef9454c5460aeaf7cb048f829. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FR59R1866344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8275357b6eda23f60e06c087f82de6c6d252165af26eef6e25c07540cdf77547. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FR59R1866350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f75742ffe1cd7c0023c72df6098bec1bd063aa530ffa2a5144540e5a9d99e5a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X42463353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b631be419d38c881be64edc5c2ea16c165cb4cf7b6cbc0689c929c8b4d3b1fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR2X42463356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d63ed88313fc0096cdd399e86cae2e40f4814ac3118aaaac58736fa120b9ab9. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FR2X42435942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4ea8d4c089e82698abafe5c1fbd5604373cce5138f78e4ad1f1170172c0c7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FR2X42463358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2fdc76da75eda582d73aa8f4b2d0255e1e712a1452660ca12b2aec9f69c69c. 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/DGA052214939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614e7856104868d274aed846c2e612f72747167a8d5e10cd7f2263b63b44cb24. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/FRX762241792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6d7bc56941b38959c61449d355d373ffe831910cbfe80fd61469eb060bec85. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DGA052214950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb5f74fa86b22059911461e17021e8c177fb319f0d6fb792c121c857f9748a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FR2X42232993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7792ababc8c546521ec6b932369a1cf8afef7dd1c46b267d886d3760066b0311. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR2X42232994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a33c31836ed218bc880ee159e42bc7e165136b0629ca257bf66a970d3dd54. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR2X42232999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b280e99144afb5e05241afe6d93426c037a399d03bbaedb422d6eebce1468d1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR2X42232997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90dba870babbb94babd9c557155c9a53cb1e70c261ff21600176a4177eb0742b. 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/FRX202109255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98cc2a4d826367c04821f80f6ed53ce45b6a587e9051c1cec70961f55ffc4229. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/FRX202109256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65154744df085f1525da522965d33246744804c6e70b48099b0d425a49016077. 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/FRX202109257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b34783f35464f504e1f988bca08236501e1108de8fd81d88043acaa7e9f91d2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX202109258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cb8dfc62d8c0dcb6fcf9d7e8d3bcf42df65544f705a5b1bfb4eb1bb1cf8bf8. 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/FRX202109260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe2365d9b3b426f3e82a633afb65c14e47790741ed89ad350f9233cbdd93a00. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRX202109262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2cdbeda6933c7c24cd62bfbc55f1cace426fcae37d3da7e5b46a79508fa323. 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/FRX202109264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f05d96f4a9a98beaef25f7da944f8613e8e38f1c7f7877b8a8da0721fdd8e73. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRX202109254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc389885ec87a06d6b0f7e15bdf5f1caa15754ebbc2e8af1276ddd10576d523. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX202109263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da9e4ebb764ea815699e5724550cd03bc38f9574fdf07b37e8f6e8784b19a5e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR10S2038995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2766fc363fe14f120464c2d22f42bba1e205b8ee248448d64347802d9d3f144b. 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/FR10S2038994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f58765b54011503a56fd659b91df8a1b582d996768b8c3cc92de7e66b7f5af. 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/FR10S2038996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93cabfd55646f44c07759e91ef121f4c1c711dfa8d0b62fd3d7a403896d9193d. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/FR10S2038997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d6f1715c2b2a64c7aa19e6e481f0f916d6e42ccd2b69842f1eff459792ba143. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/FR10S2038998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cbbe31160d3c011366d6256e6e58159dd6e505ca21b73074375809e858df2a. 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/FR59R1953843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f98bdf3ac27b49ae78c2074346fe72b629368330c1012637d301962d1b0167a. 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/FR59R1953848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5db6319c542c60f39a8abb2a9359f879825ab8ae4e125090d6f2ffb19b93dbd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR96X2124046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7c42f253d8eb9d6729a6e03f49c2dd55c7eb9f2ced64a566987994281eba2a. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAHR2376814.