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 0x863f9933121da7b92def9b7cae625ae1688be92628edbad43427e072f875e3c1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fe077c9-4344-4ae0-bfd7-5d3ab4e87734.json and https://artists.proofprofile.net/proofs/artist/8fe077c9-4344-4ae0-bfd7-5d3ab4e87734.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 0xc7e9d60d5ec88ae96680be5bdf7aadc302092b83b873248487b660b8df38f6f5. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/ES7181281107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7491c6038f3e1c3611db6f921c59dcb611578b137a8f6327495d222090ddef19. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/ES7181281110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c6a933f5caa947fad1c0379e38162d4a89642824ab2b7cd5850568bff8738d2. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/ES7181281111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa23af52c5eff09fc06271153243b92bee56ffe6fd0982a8c90ae12c592b8924d. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:16Z), 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/ES7181281112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8731c9d65f110942cae9d8b381b005de324bfe8684c960bc1f84bf74ca711598. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/ES7181281114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde166b696d0917db6d677db3076a3b7b4f0e1c5a2168c2c51227eafd19f054e5. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:29:23Z), 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/ES7181281116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8841e23bf52985a5b9667a35ea4d6cc09c948babcebda5904307b34411acad. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ES7181281117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e760cee0d0597467e17ca83ad3a6e5d59b2f29c8c530faca8e1393fea0d3673. Chain 2 (Bitcoin): anchored in block 957827 (2026-07-13T08:59:54Z), 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/ES7181281120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31af0c979e0f533ebc207022bae028268f765914fbb2f6960e79437afffed5. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ES7181281123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7747687c1f0206e817489415573928860d04c38f4595127e42079e66cddd816d. 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/ES7181281125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2727739e438a9553f82d1b8088bec0a4b6ef652e8d8b0ef84d9189a61e82ab6c. 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/ES7181281019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a18d2c44b9d6fd0195317a2fd40d701fede0597ada4a95c42a3390036581839. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T03:25:43Z), 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/ES7181281020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde574b776ceca0528c7f2f27c582efcaf495d34d29ca23cb2ca9694a7f5055d1. 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/ES7181281024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd009a41e7426fa7c8ca459f231b81df809f5604542c1f3f317b69d4206bfb9d. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:06:18Z), 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/ES7181281027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1119a43fce11004d1d8f869d409cf98b2be28db036ffdaf144a43ac61a91c255. 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/ES7181281028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9384b7214cc20227a91aeef70d304af0efb9960ab73a804be4067f1538077a0. 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/ES7181281307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x546b10ca707fd2721a3c4e64eaebaa84f839dd8c8230874b061ac6934d298c2f. 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/ES7181281310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x942b86568e12840704a2fd7fe83d34e0a00ab0a4d84668d3dfdb60a68d7f12ad. 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/ES7181281046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd915bb8067939bf1f45cc20e7c9d7ff6b60868af552c0fd8848fde67ea7193. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/ES7181281054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11ccb89c815df09cf9c0b8d9195c535764c82236552db9b77d22bd07b6f7c9c. 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/ES7181281298.
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 0x6f9829c5bb0058c06ddb753747c3f77a4dfea4b37a349a15877ab628d47b3c9a. 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/ES71G1502974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdbd8cec78449417614f3616464b3622d59c1b0988c2f5385a07d29359dc9e0c. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ES6100596018.