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 0x83076f0e3a29ae22ae5477a664b8295ce7a9a1429db92b571561b371dffe9cb2. 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/ed589b08-81f2-48b7-9bb6-8626ca8ae7af.json and https://artists.proofprofile.net/proofs/artist/ed589b08-81f2-48b7-9bb6-8626ca8ae7af.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 0x79b305c147fb85c90f9676786ab8eea7275ba8f5c82301b63914aa411546a1d8. 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/HKG731600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029bdb59dd74691a2ed6a3f00dbed5a127f6ed14fc778fe75c4a0fbe9d4a97a8. 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/HKG731600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0e6180edac23ddfbffb0bfa7f7d0b10b55b71b7b72a43063ca1c39c767599. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/HKG732412670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4efb867d12787de6dc5ca012404bcf198268cd55893ed7dbbd2627c5a95aa2. 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/HKG731741196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71760b8062b287deeb41b6fc15018668789eaba7e9dadd65b0777458f83483bd. 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/HKG731754861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ec4e5184dd3643f73ed8ebb8f1a5c127b162101f834f6b756c836ce6db7f48. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/HKG732312469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ed97c4f87744a9981bc9143613fd55be2a36b80f4fffb91fec89519a469464. 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/DGA062013379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47585a91e470e647fa33ad86355c2fa453162e54a5d43c5bee20b22eb4c23980. 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/DGA072134411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e4896ba9ff69f7b0735f9a4d09a4ed20915b11a4d9e6c3f6f77b7a93132d37. 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/FRS182069419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7ccb9bde7d730c97e91b38424cab34191390e5ae4de89e0894931ea77732f4. 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/HKG731600076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a0d44749c1544060dc301024fed99df3487185e8743652e714ad1a8fbe960c. 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/FR59R2151379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2974e1df22aaf09479314967e4ffe546ff393773821b17bd1e739f01931f27. 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/HKG732431865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e8098e9fc1f11c80f68f8cb9277f0564bbc039b68478eed2099d5c28abf02c. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/HKG732424073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceef29da5f43f060ac1e6a8cebbeca6a07c5fed9115fdb3434677ff5f32fc853. 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/HKG731681852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ced65693b786000d585b09cf61ac0db46e3621d95d3e56120dfa6ed77dcd88f. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/HKG731642726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905a6eca7c586f6150843472886b1e0aa0cc8a223e16de78e476269142ef97e7. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/HKG732318860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ab21f66dc4ce4aa79e99ffcc939244921c4bb946e5b45c4806c2522a4b5f1e3. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/HKG732292480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b6a5265d330653933098f6d11392345e08a976bc26775dcaa30dfd333dbc5. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/CNZ632201498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7edc3609a444b0954ae2db7d7e03cae93aff9946658551e7f71eb3e5cbd7b695. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/HKG732283034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4c2cd69e111fd8a29f42fad53e9aedb410ceb9eea3e33e96c68c2afe1948f04. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/HKG732264469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533dd22391a8103d1204554f3e1492283c18a801251db05a492ba41b444ba753. 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/HKG732245336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44e6b544ce93e04212b9d5c0c13b2b3b0e30be565ab17508da3d850c99d5576. 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/FR59R2272038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87179493f5814ab32b8acd84030e789dd253255701f48c0223743cb00862adae. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/HKG731767341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3edb40574036f46dbbffe9507d3e639ea2cc086ffe8acf026c1b38a67529885a. 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/HKG731713338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dddc6d3185a4ae11f08e014092d76ae0674394a10d65b1cfec56a32ddf4cad. 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/HKG732148028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728159998d17259b8014a66f4e2639a1ff6938b4ff320318f0cd50d3d01b13ce. 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/FRX762108480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59e7214eb551300a130b3ee739fffd3ab13edab3d195783d35a110a52309202. 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/HKG732142364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3572b5caeaec11ab38f1f71414e03d2cd09ac011582baa6b21bd55cb30ea21c3. 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/HKG732142365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638db05832216e5dc47d7116df8f65909e425c9a429823127bf6bd92866b4c69. 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/HKG732113239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19da3a5ee6b86713ef287c89a123b92342f073d7d3215fe5db78dd585f457757. 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/HKG732149010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefdefa5184054acea6aa9af0857e41141fbeeefaa88a1a64ce42ab6333fcc5f2. 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/HKG732132587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9bfeb766989421d40ce373ea226a7637050c7c34bb52710ddbe770d3b066e9d. 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/HKG732120343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fbf8ade188268507191913adcd5cab9df1d09013f1cce2616069091c7399030. 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/FR10S2175816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x945bb458d82496ff9a2447a4fa473809359d275db1910ebc573cbfbdb7fd62d3. 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/FR10S2105923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020c8306918ccdefc19de6b57dab54f520d84c5f673e5755a29f437bed26f089. 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/HKG732029231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa23039f9c6a13c6322234fe9d3bab80a999517a8943918e14de24de8cf26fa. 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/FRX872014744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519425507fe068a705dbedcc2507416599cc74a8475d10dcb4845844b1ced845. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/HKG732025551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34adb6315628657d58000c3373f557e7f9d50d58c4617fe7e96ce87d67dbb0d1. 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/FRX202092859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1e5fd745e6f09fbace0262f8cafd5f0660bdcbb77624af6157bbb6adf04f3c. 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/HKG732497268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dac5944f96d4dfbb1ccaeeb46ea4e13319b1ba7ca8dbd8bef875d5d20de37ff. 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/HKG732481542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4abe19358988e1b6c94a6ec0ad00f79146108b98a765af3b1b4d68a7e10b4c. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/HKG732480417.