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 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 0xa9cbb1ca49a49f0a7a53bfc2eb9c250ee954b90475507abdb456825116e4c1ad. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff78ab39-487d-4b99-b770-9b6e34a4a900.json and https://artists.proofprofile.net/proofs/artist/ff78ab39-487d-4b99-b770-9b6e34a4a900.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 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 0x5d2995145f6cc0b2e32c0bd798b8cbe15e76a4f167224b1b7266a30146bacbf9. 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/IL1041701661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf79a7f4d096fa3832622c940b3333092d73793618632d68dffcb44a06a90c9. 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/IL1041701665.
אליך ה' נשאתי עיניי / שעריך בדפקי יה פתחה
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21bccac1911556174fca3adf4260a4eba3cd09ee2ea8226324ce65032918cf37. 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/IL1041701672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e497de56f2c2b7d75602c24af381bc04713300afb86217ef9e04ed8e1da19d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/IL1042002681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf51ad0483adaddb6fd17eb3f55f2242fb946eb44c1d2ebc06b6d5390c413a. 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/IL1042304201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c83a2715bfd9743c883d00fb1de4c74a741c5ceb0e8610c88897842f25e7ef. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/IL1042304202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d038f1b3d18d092b66891bc7dbf138d621114bb33a9cd0a9be61a09f407a52d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/IL1042304207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8558b1a628501e07313dfaffe65647cb5ff41c6d4c0d9d56fcf6ab511006bf47. 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/IL1042402731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57080227033cfc4783e14874db3b480095fa57854b8f08b5e03f6af4a8e24b66. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/IL1042505971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62eb407c5520ea59c3eb087bad5427c0bb2983f3b253bae01d7289ba837c859a. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/IL1042505972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77107458da7b823b929e78267d7dc518332ecdaba5f931fd2ee77b86f6a290af. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IL1042505973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d282933fb8e4edc4e9cf6617e2516f7ce65bac8ec6bc033c61918ea82f40b7b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/IL1042505974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a3fc067c13f528c7a2d54f2ddaa490091eb9ffb9307576efc30b13b388be6. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/IL1042505975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffe906feaf36b0f563c3f996263be7d5dd5f955b2b56ac75244f0358acf4210d. 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/IL1042505977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b1aa46d867a95fef32f6cbdd621759b502a8985087ad7c903b601534ae9eba. 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/IL1042004813.