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 0x9a65e3e986e275077da4013be40f877d7b57e83664c6c1c0e22465b84ba633b5. 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/f1f3bc1a-752a-4f75-832f-042c660806f5.json and https://artists.proofprofile.net/proofs/artist/f1f3bc1a-752a-4f75-832f-042c660806f5.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 0x67c488bb2e229f7ec1c50d17d7ea0d6c45a948520437d9fc3b4a6a6ec233f074. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIO2436987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc737e177abd9fadb2742c291b163d903e30fdca47988c7615844c3ac48dc0fc3. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:17:27Z), 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/TCAIO2473902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef75508e65f21d23c58e4d7328000b37e60b4020bdfca9f7dd52ce7445d058b2. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAIP2473911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61dc4e237b568a03652716aebbe5b56953a9a8c964097394b70d6030fd5b44dc. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIO2473915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242ae7c5ebca5710cba59c95925523a16ab591d703bdee09e0bad8c0b00d7171. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/TCAIP2473926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1900a60290fefa9525ceee1d10180b90ef026a2cdae604e007e5721ebf33f26. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIP2473930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7e13d78d1cc88dc96262bb223872d41bef255b4d3538baf5af93e7c186e0da. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:27:15Z), 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/TCAIO2473933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c4eaa4f963c3cdf53403a234dda4db8bd578b98cb24398bd4455a953e86d892. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIP2403602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84d93b9d5721e0c09be396f6169905c6e5aea44023e37be94b61162a97b198a1. 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/TCAIP2403603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62121965bd2f74ac995a405f9ac6e7dd5b5e4a4d5e6f1daee494ce0494b4384b. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIQ2403604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abbb854a245d618d0f0cafc4e7fff60f650487447d88f6950b02b7b103bdadc. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIQ2403610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d33c625bb98ebdf5005f0bda341fdccd904a0a188c167af40a88ecc68d0874. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAIQ2491122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df629b351770ef29ae88f987ea6786ea5a62e7ec42af88a3c66bc74c1fbdfe2. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIQ2491126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba8a78efa354e1bb73499ccaeccc9d02570e36cd34de38577f721dc7c215267. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/TCAIQ2491131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be4ff38dd5a08e96d15982bb6be88bd3432964628c3fd0079a05608b13debe7. 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/TCAIQ2491135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d91d7488a6ce818017271b26ca89a0b4fed513f5c009191d610275cb4901ae. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/TCAIQ2491136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ef747ef2905256f0df72d1aa5b1ce886ebaf6948bbabf93309106844ba998d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T03:20:38Z), 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/TCAIQ2491142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd714eced9a8f72acf7f3c727d4cc7cefa48af3a2d0ae228a0748b8334b266911. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-17T04:44:09Z), 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/TCAIQ2491146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb149ea69b8487ba06f0e48bac26242fa6837ed715560d3282151231ab47164d4. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/TCAIQ2491219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a54acd2117d777fcb65c7272a7743afeecbebae67df9b491ea7b6a0145414e6. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/TCAIQ2491224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f95279c914ef6a8ec22a1961f393fa2391185e9311ce19b0fdc073aa94008e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIQ2491228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b839158b12f79088aa8a44474f55f79e983c44fdbc248d507c136a68011b97e. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/TCAIQ2491235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6f336b75c572bf435e7a80415ef7d8b2057b09ab356d5c225045da37a0e368a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:42:16Z), 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/TCAIR2491284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc213a2fa3f76be64e5a7f450f3e1f78512e10b1f5141ae18680a69a71fcfef. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/TCAIV2409091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e89d0cd453edd6ff499739b2a792fe53baed86f1dda2c299f425f4e7183217d. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/TCAIV2409097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fff93acbc1a39dcd2d32383fb166ae82f4346543b1410dd6d0ea07208a77fd. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/TCAIU2409131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f9706adec2927579dc29f5278c55107135e18360d57af728b88f490af950f9. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/TCAJB2451354.