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 0xa7a47bb6203b4ab071595b9514607b7ca570e9fdcf403e506bb9d919fe97d2a4. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bddee462-f633-4b3c-84a6-28a5add870e4.json and https://artists.proofprofile.net/proofs/artist/bddee462-f633-4b3c-84a6-28a5add870e4.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 0xaf7c97d5a25998fccf4342635161fa0b8f9323ef54fa619ed56b008d29ced4ff. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/KRA341631736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f11423a1f6e68b8b723b52aa3dda1ce2f29e3cd9aa0cee7725f1401a630e5ad. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/KRMIM2222803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc04650a8da301dfbb85e5a47921a6e44902c65114d46c2ea2712f4a4489aec9. 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/KRMIM2202753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc20534c4bebcb16905fe55b1dca3cab9a778d1b72ec0edd17b58bcc36396ed29. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2144867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56fa560a9f6b8b833c9608e92c4e6ec8ea84d0b9973d7f48db1dfa1521b80069. 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/KRMIM2130838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56582b4075c16f5dfd9235ce5c7a93a53592c01039e0080ab6d238c1b16d6db7. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/KRMIM2121538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c69e407a91ed50adf4a4a69e2cfbd76a6f9513577052b0f05951cda63ef9e20. 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/KRMIM2102709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc17d5aa935719d204873c9e36f124be231796427f9d47ed0f73f2146ae64b980. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/KRMIM2102710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682aff1c23746c1d4ba79a38e5940cb707f2543f7937abdbf33b6e953fc87684. 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/KRMIM2027282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a1301e447576e265acbdfbd43be4d530e7e49f590ba40c5879d4c34d5df406. 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/KRMIM2017871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ae1f6f9a9943ee91365ff96cee2125eafb800cd5ed86d2a5f68cb5a7377518. 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/KRMIM2000513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6945a0cc8376e38a80a9d85c63261fbaffdcd20e3d32364263413d945c63b51. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/KRMIM2000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e663f103ef499bc4111cbeddd19c047a9976989f54d32a4c709c77e1a715d4. 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/KRMIM1918430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c2c560c81a0716efa5e9b809c24053232238b02f7f289a3384d65f872b0f63. 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/KRMIM1912801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16906d50d6d72edafc6755dd26fe17e178776f26bae5463f018ca428555af285. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2116613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9baec7494ae9d69dfa95ff03d7b351ab95f209582d1a4f780c8f16d745776b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/KRMIM2122954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b058da12dc430a540945112825ce842769e25fafc98e9f90e54af3bfc96a9a0. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/KRMIM2122956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10c785408f1a72dc953647f562b2b3530d539c168a8f59f08ba77a08e367bcf3. 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/KRA341679370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e25f7ed51df89e293cd5b2715850318deee27b6bc20f03c70ae74b5ce58301. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/KRMIM2119581.