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 0x58ff8da4a67816f13cf6b058a2fcb18557fbdc6bb33088fdb1e7381ee7294a7a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1d294299-c950-4909-94c0-8ad46b08a7cd.json and https://artists.proofprofile.net/proofs/artist/1d294299-c950-4909-94c0-8ad46b08a7cd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2444be72eefcca8c8269a2f5e0d1a98065171b75d4baeb216057fb0a34e9de2. 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/BXKG22301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2fe40e32a18a27918c8f25e8eab2585bbcd9ee9f7bb2f02e9e3ec0099e766. 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/BXKG22301701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2a886ad6bff11a3f07e658e8344ebe83c891ba23ac76de9241f60010259a707. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22301291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6adc12f4fecd6831b6a8def48928b66f4f36a9eb1bf48cfc7f3cbffd910dc21. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22302821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8396b0a8cdc0c98cb6432d8ad5ce9cf89793f8718e9ca212af52ed07264a024a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22101516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb712e5a38e0da1ac6fee42970e8eddc0a95f0727ad77dfa94d1a66132554a9f2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22302781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211ad7a97dc8833dd19cdc6fa3c427dd3cb3a6ec49766fe4865402e87da25ad9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22401385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd31206b2717eca6e890326696f1b361bdfc025482da7a41bb744bcbfa0ca1d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a06cfb3c6fc75b04d5777d2d799a61d06609e1cc54cfced197aeaafea2069fd. 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/BXKG22301974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70849acae80339d0dff2e6bb334c8025b59967eca5df212f3afbf34d89d8464. 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/BXKG22301539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7581edbe80905b750aeb3eb22813ecd0fd60f804915c349b33c497d858c7984. 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/BXKG22301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc437852828a2ad161c6a4a5fe5c685a8d3f920ef6cdcd69ab6790f39cafe32da. 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/BXKG22401176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8fd4168cf6cff698ddb3be04cd7b3e424319e790b29392edac674c3949bb2b8. 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/BXKG22400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0062a2e38fcbfdf689eeda0e418f0e8c701eb4c6ecadaa0b58470bccd3a8d2a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22302793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabfb47b686dcf05b561a6e8581d7c0902757fcfa89007c1e4788fc24153a4a7a. 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/BXKG22300810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aea6e30846f00e733345b4f17b16a72d11dcc42f2d0f45a0644b91414b23430. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BXKG22401701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686c0bd196851dd05487d31f7f326f680d3fd7a84eccd48fac550ce62ac619b0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22401696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62fa2a75b3abeb1d42356c5a6ebc6d62988b7e659dc6014538a92ed6843e4308. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXKG22302796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7148e16ccf2dc89610341b0cc6b146d618250ebd6c0cabb30ab6be6ed8e3e1b8. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BXKG22302450.
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