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 0x71fb234488b8c0e29f1eab4570d4546847096427da2ea0057d338348f7391cd2. 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/175bfa8a-d542-42b4-a838-b48b6dfedcf6.json and https://artists.proofprofile.net/proofs/artist/175bfa8a-d542-42b4-a838-b48b6dfedcf6.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 0x4146bb516d963b29005ea9d041cc1c880eb3bf4ddc8149474299e21971f79390. 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/CA5KR2392397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45a659e21e1da36d7bf8602e0b6aef2fb1891423f6416048fc8c73d5230a721c. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:07:16Z), 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/CA5KR2392398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f3263c25f2e6569ca6402556f16f620d9545a7537c851768db1d4a00b3b9e3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:49:30Z), 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/CA5KR2392399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b418086a0f693b41f7d67a0e5477b84f049ce59f71533f80eb5d4b0cb74a60. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:38Z), 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/CA5KR2392400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a0df94f66450a1dfaff51eeaac46e5b9d17ac448eaffdb7b3aafd5d2320688. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/CA5KR2392401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1f8c2654597ac462c49196133fd770903df2affc99e54933cad23ce0f2b588d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2392402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f043990a0dbc4e3b73b506f094341a6a7599f954ceb842fbacc1655d9a184ba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CA5KR2392403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b23934f160273d5b4d9fae03479c60c86ef411c712ca3799ff9627dd13e646. 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/CA5KR2392404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe49699c827ab8d8a940d0f133427635cf5228915ccd4edd2c13787c988f4164c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:10:30Z), 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/CA5KR2392405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3633d916c7899808ac9c334544ab676393e1560662fdd2317a8569d5d686d0c3. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:53:21Z), 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/CA5KR2392406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a1530f4aae9f6191edde42832346bcd0dba9146e1b2625c87e825f1a72c99e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:23:30Z), 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/CA5KR2392407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a68b01ad707d78d8ce23b94f5224075973c20ab7018e2c415393db99b73750. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2392408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7812aca5b10c382d2b71cd30d78fbfe7674a83a0f85936d7f43bede4691ab69. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:51:49Z), 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/CA5KR2392409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c8137499b8b9044834d6b5e84e20c8f808f70084a390110ba47319786653e26. 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/CA5KR2392410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe322e6ddef98373483ef8d32ea42c0088b50da21c2bcdf7e7e08e39f0a4ad7b8. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T07:56:59Z), 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/CA5KR2392411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5397e5bee83d3589224e0c294ffea53c834759631418df7222644add4ea9ef1f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2392412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ae531b69bf6a7193870717f7f7611f3ddae869591f3412997a0f106b2e36c1. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/CA5KR2392413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dc792b7c189f15d2449cce5c13ba803b077bbc1ed049144e5fa57f4e177363b. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CA5KR2392414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f21da5288fc160e7dd7f96fcc43facfd0ae34a57b796a60bbbf056ef6bd4ad2. 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/CA5KR2392415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe417aa3e23001fed675b3c1a7c1436e1368671d89560c489929c630739f1104e. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:58:05Z), 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/CA5KR2392416.