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 0x9396754e7d1d9e136afabd4014f02ce4229029b348887233d658ff55f76a04e1. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/03262c8d-0f73-4834-a7e5-ad745b4a1801.json and https://artists.proofprofile.net/proofs/artist/03262c8d-0f73-4834-a7e5-ad745b4a1801.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Long Day's Flight 'Till Tomorrow [Extended 2009 Version]
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 0x33055ebecd3cb27a42550b9f6f777e86b0a7b398aed7b5dd4e18a97573a7ac27. 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/NOAHV9833011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3f4376808d378e35b31ca919fb16af56c2121cc080791b6949dacbda7cb25da. 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/NOAHV9833040.
Gallery Oslo (A Long Day's Flight 'Till Tomorrow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e898afaf33b57dbe2817770cdecb5cc69949445f176a2455b4ef059445019d. 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/NOAHV9833060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f1d8d0b467bc02b0cf205726c8ba492f8399d04fe23439d82c67b64173d684. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOAHV9851150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf772a8b81fd23264afdda3b6665771be0903f8944fa51739bbe2a16b0d9b791a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOAHV9833090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc81fa344448603770be3369b5f51f1877446ec45e13eefea1c7888906fd4e40e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOAHV9851110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceeeecaf9da563f1e1fa6b1f0077e90a55699766f6c91eb4e3853a60d5a0020e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOAHV9833120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd0aac94bf7fa4ceacdd5dade9bb1288fdffb733f93e938fd2ba7e49b36e494. 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/NOAHV9833130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e7d7a3c85fcb8257bd91d490dc2b8e81c7cf41b2e561fb7b397d1dd575c6aa. 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/NOAHV9833140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c0654c92a8cb7c875d7f87868da341fca46011f867a3a81e42a8d6416a7ca3. 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/NOAHV9930010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeef15e4bdd42f549ff44c5a295618866515360f4e648fcf320974a29556895d. 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/NOAHV9930020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc75c2b871a302d39bb8faed3fc6c7957a34a5c67377c19511719f95a5c83e65. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:21:35Z), 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/NOAHV9701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73543ceea979ba0e9f7e470ef63aa45e79e320739b228ec200e2241f3179622a. 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/NOAHV9701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7931e12c4e6fe335120c03276458e547002b745defbdf81e31e04faa6e88965. 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/NOAHV9701060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b8485bccf432b6d08d7e20800bd189bfc560b83814404c7bc5b9b6053f90f2. 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/NOAHV0901020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6660ffc4c9091430fec45a0bc45a1ec947bc36ba79347c9e1ed3d5801a6f3438. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOAHV0901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd968d0ce716794c939bd0817e397885fbc5b88db7c64b55a53d716e560501903. 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/NOAHV0901050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc75c2b871a302d39bb8faed3fc6c7957a34a5c67377c19511719f95a5c83e65. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOAHV9701020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73543ceea979ba0e9f7e470ef63aa45e79e320739b228ec200e2241f3179622a. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOAHV9701040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7931e12c4e6fe335120c03276458e547002b745defbdf81e31e04faa6e88965. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOAHV9701060.