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 0x9f27924a3b7de62b9cf2545d2ce0cb6ea61d483c0c1b373f9f4ef59624f4b891. 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/a71f5a14-7c4b-4d66-adde-20cf976c59ec.json and https://artists.proofprofile.net/proofs/artist/a71f5a14-7c4b-4d66-adde-20cf976c59ec.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 0xd0540921e001a4513ea7d77d49c6d8838cb8f0b6ebb7f2cc633f3c5a193ef84c. 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/ART720410243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e0c6bb03ba58c752da9bd07dfd246a04130707b963cccaa631a112b5a5e9b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ART720410244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2f99b10235ef3c673ed5a27a7f0fbbb0ce037911ec6a84c1d16d6990193380. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-16T21:48:38Z), 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/ART720410245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3596dbf33b4fd1ce13bb2f4cc315045b6831761fedfb1deab67658090d2fb96. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ART720410247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf28effcd84e774c124c49bca76f818e8d0cf3848ab0a062648e7a1e9a7e71464. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/ART720410211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812aa174351535653a4422db7f4f8029221c4a03969bf7c88a9b5301bd61ad53. 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/ART720410215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaba964b0a588dc1b1b4bf7ca5ff10d33e9894303f793018acdecab83e86dd63. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/ART720410216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332f8d5d27991859997ec70c06716367452a02a9cb85e5eea556cc5c94147477. 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/ART720410217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7875469fce665d51f16527ffb007d7a294e2654cd38644dfcf6f33134da2d748. 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/ARDHX1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98a8592eea40b4b051bbd0c3a4235a92418eb5c0ddb4fefaf8ad6d9699e50a9. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/ART720510405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd756433b82640bc058aa373932f37639857a66decc3f6261c86681c7ae1575. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/ART720510408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053ad107de14dd68a456f69caceab904e18d25ede069b10b7884627bc13b30ab. 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/ART720510410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248d87af4474b9dba21230aa9123b30a3cc5b37485e70cead41faa8efec8baf2. 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/ART720510413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab0cf46b6ee0d99edd7f9c0546629e5c8f2cdbb49ea496eb587813f50ef887be. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/ART720510415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5dcae0e62822528a22263cc5b8aea16352bc99eaf675efbf601eaab43cb1567. 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/ART720510417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3f91889dfc8eba1cc75cc744f644ef6a661d20bf4aad35ac3a810b64701476. 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/ART720810373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe3315630b1b1016e56eb561c1b7c38050e860e9309283b11274d710128404c. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/ART720810376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189879892e7f68fc20134f0cb9e9f7b29b0a75cdb3b5fe95e35a9ddbc2e44623. 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/ART720810384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7875469fce665d51f16527ffb007d7a294e2654cd38644dfcf6f33134da2d748. 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/ARDHX1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc41ff034fdf0d4153bf1c40c9c3129a5ebd1ca0149d10b623f035860a66b53. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/ARDHX1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaff0f2dfdf179568e2208bd74fc9ae692b15f7cc83d31f7118f369ba0f221a0. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/ARA191802264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7552d523388a798b400a3b34cd37a8e27d275ce3ea49c035e09a436148ea9d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARA191802272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e89648f28369583604863d946e86888b3c1d62cc723ff2142d8807b38ac324. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/ARA191802273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d917b4202a74bebeb7da3167e7e04cc71f4e127fe7fc3c34744851f2cd4232. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/ARA191802274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3fe2fb8a3a09b88ac3a844d7a05c338fe592d4ce1cc31fc38dbd4280ca85839. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ARA191802275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c2cc14ee40b6db04880c1f8f24a28a246b9f696ec5cbdf8113079aec3e1352. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USHM22487885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab51cd5c818bd42f076fa14a50d4eb38aca437486e639c0bd48aec6d8226f1. 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/GBLFP1847426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2a87de128bfdb8d37bf7e7782c38bcfa010bd505ea6f758b8adca807e8366b. 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/AR0UU1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48c971387607440f25eb64121ee79a52f644b4c21bfa73ec59de14ed7fe02ca. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/AR0UU1900014.