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 0xcb4c99b58989d5987d8c1de616c3bf7ee36165b4f43679ba21475d4e895df1d8. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9cac3a12-0dc5-461f-973a-2f7a2bc2dc98.json and https://artists.proofprofile.net/proofs/artist/9cac3a12-0dc5-461f-973a-2f7a2bc2dc98.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 0x85b04b902fa4f4023372db78b7629d2e5b703f7591fd06466c1d06447f94029b. 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/QZGLM2359643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b4d54ea5c9e38879e30bbcd1eecc15d377ae7efc9aabe4560b15239e77dc98. 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/QZNJV2352523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab993e3120142b85bc719b93cf591bbe5501b8907f5548c272943ce094c53e8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZNJV2352524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0af3774c072a7250fa541d865aeeb4f00e60dcf1fca6b821a65a49f03f0b6511. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QZNJV2352526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f641a14ff2b11c6d487257b4fd4a24706a472d000c9a58de615760ceda2adcb. 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/QZNJY2312698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0318174ff85b25f69b53f95cf43740c15e5260fe9072fc337d98c7aa4a1597. 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/QZ5AB2469825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6542831e09e3ef8f64f0f7dca84973cedb021777686d0ed5a54989ff06087f8. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZ5AB2469823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa537f48b3735fb25c3584d128c1007f804e3e385ed852ea62e331ba0d1fc11b1. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZ5AB2465110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d5a89baf1b20a31e7a1ec3bc1839c3216a9edf29c5ab5bc131355581a316b7. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5AB2466762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6051961ed61a4ed8208e5e60bb909ff5a58aeffeebc2ca81ceb42a4a280bb6c1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZTPX2426748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x759b0c7c551af399b730c6c14dc606c6604ae5911d9f3d5c21436de735dff10a. Chain 2 (Bitcoin): anchored in block 957723 (2026-07-12T15:34:17Z), 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/QZTVM2403244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9abf525f8992fe4ff2d30e0b01eede10c8e0822bab955552334f6e9b1e79ca. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QZTPX2492018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a8ca424599fbba687ed49a38e41b7f121c745933c9031306f9348fdb70099d2. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZGLM2577917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb0cc373fd5bdcab6b617d1fe4614bdc4384b5b036bf73390df8237eba4449b6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZGLM2577920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560d958b98424090625600ce1cda8afa4959f9b753c4f7adb9ef6d9fa8a6cb66. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGLM2577921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8d9d6b6100292f74a7301318b6c4e224c5771b7f1ca9ba17bc0248547e1a58. 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/QZGLM2577922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2636b973308b6bae37b69d769f501f4317e2ca82d14c0d8e81a6a6072152e629. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/QZGLM2577923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x282902113b924ed33824031805d3b4b039b81d53eee34fa4e2b2e62a66fd4b2f. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:30:28Z), 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/QZNJY2594661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20983c1b559d08601d812457df798c1006c284025ab014d7fc44c2ccdc6a1ef5. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJZ2552203.