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 0x91ed363661e45ee5fe168dc57ab23b4d48a3b5ce29f844d2fa4240cb02ee90ed. 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/51d6dd8d-b07e-42b6-8311-ff6aba20c57d.json and https://artists.proofprofile.net/proofs/artist/51d6dd8d-b07e-42b6-8311-ff6aba20c57d.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 0xd60fe5cbb1b3b561ff1c0ce928aff00c922c202d8c88e4359ebaa4277adaf4d2. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZHN41928725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c1a714b78eabe72fa7ea7490eca5ef0a55c1f87d0c48eae7f5eca547ee785b. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/QZFYZ2026077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d70dea9354af8acc065563ac3e5c3320f73aabca61eef397d838bcadebf3e3. 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/QZFZ32096417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50ac4884c2ce581c68c705b3519f54224cc4fcfbf37385b32a0f2ea6f8b376. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMBZ92030837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4914720eb62ebc59af702ee565bf4771238f94d67207261cf64508b4d440a0bb. 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/QMBZ92096181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0144fbd872d2c6963688f10e3e9321472197d48f6001f9c104995fb40bcd7b9d. 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/QMFMF2016853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d04cdfcd79964c596937b472be260487f53d970c76578af0b9feb80261773e. 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/QM4TW2199222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a728b751eb56539245cdf4f0666b6fb5b3aaa2d370f9e31b11054e0822afb7e. 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/QM4TX2177359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d04cdfcd79964c596937b472be260487f53d970c76578af0b9feb80261773e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QM4TW2199222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e11c7c6967063493fcfeae10311932b55b301108b0ec6b0eea8d52f5d56f01. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QM4TX2177361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c49dff4b6a53e696458bce10eb3334209110217964d31de7971b87c2c379c93. 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/QMBZ92198989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ef3f9a20da8b2cebada3bf8af566dbc0d788f0787f12a4ff7af5f3b22ad609b. 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/QMFMF2109471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263f660aa0f0b2cbc4b735ec0a1999142cf3a3384b44b3405b4a3b7fc896e5b5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM4TW2214181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f4509acd8067f54af0a745474ba180f23587c7ae69941d25aa4906e15da55. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/ES5022201962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f37c698856217c9d8a3bb8498a1ac61b40391620aec89659d59dd9009784ed. 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/ES5022202122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f37c698856217c9d8a3bb8498a1ac61b40391620aec89659d59dd9009784ed. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5022202122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4a741fbb8d060ee84be32ca16acf4db90cbf274e2929e23b5a78d021547a0c. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/ES5022202130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74539e5f628d05afce47f8575be4c638b30ed06e329835ded0f0456a1e70e66. 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/ES5022202132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee594614db632b2a0ca5c91f53a8dc8b1714ad18ab2cf63d0f5f682129ccfb87. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:32:49Z), 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/ES5022202133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f37c698856217c9d8a3bb8498a1ac61b40391620aec89659d59dd9009784ed. 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/ES5022202122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44f4509acd8067f54af0a745474ba180f23587c7ae69941d25aa4906e15da55. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES5022201962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f775794c8a4043f7fad33e53890dacb057d9c7f69555316f079bbe345377d97. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ES5022202131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd74539e5f628d05afce47f8575be4c638b30ed06e329835ded0f0456a1e70e66. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ES5022202132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567225e1736f234342e5c4ff1526a96fe54bdf1a7554f6c474c190b1d6d28b12. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:59Z), 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/ES5022202134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6450f19027103c44b94138f83eff99de1507670f87c99aa9bb66260e3ceda3d. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/ES5022300584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de1ad56c55b50de625f8bc4bf46bfb8cc775fa8f0667034fc9ce07241f4ca00. 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/ES5022301005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f0edc03ca3a52d98b4369c8ffcf8df6cdc418b5cfbc09373aa0d35f5de3a62. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/ES5022301888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101e5ee89789bca96b9fedd8ec869552256d75d83d1ff8d7f07c2a911e3e4cc8. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/ES5022400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde224a7c7323740a0bd5269cf414d15cd28bcb0bea7eb7245caad7833d427541. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES5022400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde224a7c7323740a0bd5269cf414d15cd28bcb0bea7eb7245caad7833d427541. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ES5022400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd2ab063b7ebe1b97652cb78fca5270d84ffe1969bed5f650d7b197ada46ef2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ES5022400132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe4a2aed5c15563be0c83638a63cf44fc526e0e00e9ff9d25f31ba1efa02a9e. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES5022400131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393c3094addbc7be4bdb2bb01ebc02d858e7b5be17e3d70709820358902886b0. 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/ES5152300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49452e867813931866688963d676165ae652eec16625cbff75e473bd810c0ee5. 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/ES5702200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49452e867813931866688963d676165ae652eec16625cbff75e473bd810c0ee5. 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/ES5702200394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b98c7d4d8a16737a604fc5106ad2ebcbeab778fa32119e16b776bf2611399a. 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/ES71G2117046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056ff48c770875aa64e724879733bfff69003c0c876eb48a80aa039c19dc3330. 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/ES5702101842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748e34cf446bf748b74de0fda817c11b84076cbaceb6eaeb6fe53b6044fd22e9. 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/DGA0S2403027.