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 0x2e272a2e408da1379f8e133b55260d4ee9c64de0eb33d8fc16b1d8542709c7b8. 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/87833773-596b-4a60-9be3-50fe3e1b0225.json and https://artists.proofprofile.net/proofs/artist/87833773-596b-4a60-9be3-50fe3e1b0225.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 0x543bb762fcf8e0160981ee9d8eff61c9e129fe1e23614501a072671b83297a75. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:19:14Z), 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/TCAEG1954437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94ae5f394c0bad2f8c38c4eff3b2f2ee4031a6af5ba3bd494b1dfd597ef31ea. 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/TCAEG1954457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15890a9c16426dc8b4646b017c766657bbaa6a88427d5c2032e60f16a478382a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAEG1954460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48054c31650e0faeb5794e010ee4e5ee19a63a08cb3f4c18453e8584afc4f183. 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/TCAEJ1945420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa57a9cc783e4cc2bf468534fb4e498814b53f6dd89b4038975b58bcccdb4ad. 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/TCADR1830971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e1c54a308e91ea15d846ff1acaeaac2247e63d92c1ffa2f526f373e437769e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCADS1840033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2ce3de54ba1aa74aa4e95a1058e052fb4b4ec04568472a82d005ec54da3f0e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADT1864026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca146c20f8d07df4f6db6330cd7612117bf250bfcfe26e3aaf63864367a8af27. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEI1941236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d9f7610bc01ae3a35eb111f6afeb7047b31e1331c0b777e397902fc1f883b0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEI1941259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1187d39d81f26d072cf532284817a9d64f3033b6fc8be819ecf1e25e927cf5a6. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAEO1940644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd299e1b261334460dde73e59f0a37a3f8ba04aeda62b7effb82c253a9a54c. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T03:51:03Z), 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/TCAEO1940653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e68b14c898ada3cd9151665511c2547001f637a0d7661351645a656d62c06a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/TCAEO1940673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88586f0d875bb195a923c0d5921785de9f2de9656ac22353fe9719f1a2d08dec. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEP2054219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cf16040646a4139eae93396aaf26c58082a94b0c09755bf82b5e8b7b3065cb. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAEQ2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefecaed4ee0dd9e40822431ffcb775fe7b8263609699179944701723c7620e5f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCAER2024326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a693c53ecd4b64a9bfc2903243f7890146589631ee70347cbf0353624f65ee. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:46:12Z), 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/TCAFC2062102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f530ad856577a48b6ca91447e2e97fa1e07499778ed8934b66669da09455b8. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAFT2118129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61eaafe29f7e482e47b0add72a2c0b457f8c717093ae7bade3542c369b9fe82f. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAGC2277368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82895c3b0a55ff31aa8d9eb71b2de9475dab7499256837aaff2f499f35505edc. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:07:54Z), 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/TCAGC2277426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27edd64e031500f217a3ee58d2579cb25b645e7c2a77ec8f375691117d6efb14. 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/TCAHB2339774.