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 0xb2f10a91da2e45203d535a432a042db00b9e8c8cf0ff6b366d58bf9bf2848efb. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2b61fa89-3c8e-410a-b1fc-9599e21b981f.json and https://artists.proofprofile.net/proofs/artist/2b61fa89-3c8e-410a-b1fc-9599e21b981f.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 0x6e9c1dae185bae184fc1ebd824624da1a7285f7d529562b8d401942418ae955c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:34:00Z), 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/BK54O2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140c5a1c2376443cbdb2fc702e050bce996418db3d56be0097d18f41a4bce8ac. 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/BK54O2400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a72f4949179f3492fa1957aaa26539fda263758cfa6d1d10b6a00ce6324462f. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/BK54O2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08147631f45de58c7cc60878cc7ec66000093471d65d360c8393065f0367d542. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/BK54O2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d855b67c7b076ee5a36e4c47d0ff0bf8fee2ddb46446d4dfc5129e294037306. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:56:32Z), 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/BK54O2500029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f5ad6ed98450844b5dd01371e7086f6279b907329ea71afab1ff4677fe52a68. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/BK54O2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7b4df5c4fdd0721686b8c28d8fe7f53729ad6a99d3b244978edc365d31871d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BK54O2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa213b7c42ecd6a55bd4700927b34316fd1092d9010739b4c9388b8ae824c9f. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BK54O2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3efafa12a2f3c2022ba1fb8e3b625f0642f1a4835fb1e4167a1ee15db18847e. 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/BK54O2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38f345698508db15016e2c8ab448f70c6850f1831545f5bd45a48a7a18dde4f0. 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/BK5402400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2f2c9d758ce923ad361a7568eaf97680ef581645d7dcdc8b47915a17ef122f. 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/BK54O2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x513121e704f8c14d3e6f3fafaf7a67a722fdf35d829cd73b4350ed0c4b7f086c. 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/BK54O2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ddef15e64983c5c6b9c4b9313aac64258da5cec673836071363967f5cbd0c7. 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/BK54O2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb525157651e0a2d50d8033e7e89490de496509c70b443cc80fc609ce1b4b71e2. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:52:43Z), 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/BK54O2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c2e34da06c30354e9cc0f3973bcba5f360a2c32643b99276e80ff1ad1ddcbf. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BK54O2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd115f4bc4ce7567f9545fb15cc9ddf127bcae01a53dc95bf23b0965c2e44e84. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:26:02Z), 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/BK54O2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dabb632757ab6186c26ad9280ee3699e5cad834a873032ef021d11d2a9fc95. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BK54O2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51363f96c259be6d1e3012bb4647797295f45185e9b1c13b4bde4d1976cfd46c. 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/BK54O2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0880c1a39564f2d01af1150ad4d8259aec1cc821710e36d07efacb916d4728f. 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/BK54O2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf8bffe7dcf9df09fe6ed77b601c907be41def587ef2cad4e0be7395536078c. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK54O2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7019b781200076e78a2c32bbbcd72a714ab2b38f1c92909f152dd438e1dcb30a. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/BK54O2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab969b8972d853f423071bad75af1d360e30330cf75424d0eae7172dc88cd9a9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BK54O2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5341b772dd904032c812f434873c55263c167ef01c9740ea14ee290452385fa8. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BK5402400011.