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 0x5cd6eda774699c6cadaf273a6423da26f5dc9a1dd5c00281b9d6de055eb7d143. 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/6c2ff5a0-effe-4cee-8f18-1e9e7cc5e86b.json and https://artists.proofprofile.net/proofs/artist/6c2ff5a0-effe-4cee-8f18-1e9e7cc5e86b.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 0xcc2ae1ac6919317dbf47e1f2d432c06f2fae73c5152574353efa856986df040a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TCACC1440728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcc5332bf698405a85a74bc15add5c103f25dae44472860e6366adebbfd2aea. 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/TCACC1440739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb932aeb3dc26013773359763bdcd21543a4bc247394526e73234d99613a8df49. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/TCACC1440744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d852d30b346e540bac957c332d4f20981b2a8f7b921c8c244cf63033e188be. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCACC1440806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57c2bd522a2a0c976acb0a910b9f1cf05f5f96a72aed058bbe3aa4ffec04b91. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/TCACC1440809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacda903657a5d9d025acad99540a968a143cd1735e4f45ea1de9ed293714676f. 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/TCACC1440810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x733596939eeb37f6380fe86af123b0a6cc6af9537af2cd5fd6d14865307a624f. 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/TCACK1512134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a254011356fe859398bec9a759f4a356ee3adee9069349f2d16b070830b89b. 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/TCACK1512149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901eab12f2deb0da6fb83213010f24305a1476c0619e2a9bdae62b130afa915d. 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/TCACK1512160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3db0590863e6630b1ab268c20cf1ac6b9027b3904b2d2a30aef4393f077a7. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/TCACS1628543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a71a96e757acf6ba6a8ec69d0618f4399d183b9af81a9490674f7535e62e643. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/TCACS1628544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6956078308d82b9deedda4d5434a810cd3ec35475f2b9e1a41a8e99a6a80b63a. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/TCACS1628545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14367003c1175abab59840b9738c0fee2ccf5bfbe9dc0e1687bd3c8469114628. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCACS1628546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c8314f1098099dd05b5b0c9b30f33cc6d7d2049d5f5a6da1d207c4f4d7f652. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/TCACS1628547.
I Built the Sky (Striations) [feat. Tim McMillan & Rachel Snow]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x638d35d5b321d29f351a36e28b3fcd1f814439d75858f29a0a554d34f0207556. 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/TCADL1842075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975dce954a90d7186495564644c15d6061e711ba7200f8be31db8ce74b7d2f28. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/TCADR1848604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45591db94e089d028c99744453500fdcc2be0b0e508d349cbff19b7706bd6e79. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAEK1988869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bde6ebbccb35aca5ac1c67a3812764b0153bdc19f10feb76f8e0106be39615d. 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/TCAEK1988908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe89930e84774108e9d9da230634eeffa29d54dbac07cbe71fc74353b35582ae. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/TCAEP2048699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb289a2e0b2d6cfd98c8f3ca739c72673b113512084f04af796a73249af3c5311. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZK6L2012499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf35f4bec3734a3ddb630802f7646671db30e27ae2ead2747f38ff726616171. 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/QZK6M2137381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c69c89850363a8ecbfc17bc28bf5f5cbf382b0c93fb148134371f012aa282c5. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZK6M2137383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfdfbe440c1a85781080479729277142ae36902902b9042e418d5e732d3e950. 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/TCAGC2284640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0a0d7146cec29162054feae9fb89c1d1d1f7da3fd7c6c40925fbbdfc90309e. 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/TCAGE2256591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6aae9fcbfcf6a37e3c2ed14afe799d11dafd385e750b5b883203b75f9f3304. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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/TCAGE2256603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e0b2a2b6ea1705f1fcb23254cb8d7c644cfcf306199c0947b268f3cfeaa1ce. Chain 2 (Bitcoin): anchored in block 957717 (2026-07-12T14:54:03Z), 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/TCAGE2256619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eec185c2e77b9599d7db58fa222db0cda59aeafd042d207b5e36030852303f. 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/QZES92324987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8577f9f368168941889d55dcedefefda6bf7aea1c5ee7031a65f317627ddf050. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QZHN61943812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eaeeef086c2375afef0561839692641c933ab9c8b300e2bdaaec8f75c054555. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZMEM2453952.