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 0x3483e4801a50ef49bcd180100ff715471a6f5b3d61d9a722e78cafa484f40fa7. 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/43b28d19-1fd7-43dc-b2d1-eda6e9094317.json and https://artists.proofprofile.net/proofs/artist/43b28d19-1fd7-43dc-b2d1-eda6e9094317.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 0x2fa3719ec3f1e1418385e0f4e02171c48bf197b26cece197b0844166fc46af5c. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/US7VG2473410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c275b8f76ddde8dece15e51e8966962c27d4e679b41fd66536650ed41d448fb. 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/QZW9K2449123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9d390027ca0761bf4d1bb70909c3ba9c9b3e91a7093f4a7a5d3ac32f64d7f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2449391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed59119598a6e1050571c73f24e59bb6c6013c155ef77db7f470d0c15c1d6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2449384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef43c4335bb51515bfb1055672306797d92d606b09579880363840dce8e56a. 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/QZW9K2449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db6249120a016c006c03ee0981311fecdbf2e647e5395a716364727e9e05273. 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/QZGLM2486702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61e48fe2e03d61d1dba15c15a72ec0cef5933f450f4d206efef1dad7a569b3f. 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/QZW9K2462070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e16cebb8e43171d70d00363377318e397fa191ddb87080671f749cc8a3ca37. 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/QZTVM2460648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12028f1c38fbb967618243fa75d2d3e1948cdf12c9fab3be3fc74c1bfddc1f05. 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/QZNJW2469896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5edf84a20c08d14a798badf41f7148d4209ffd2057768f566c2cb9f59c0fbb. 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/QZW9K2449002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4213111d731df0dbe420aa1294afd75674a0e3d59a84d419fc24df1d3bcc41d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2450481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bcccb0557632e8517cef2bc89be348303a6f14bfa35b0ab20499919df5ba5f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2450479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01763b19b470fb77b0e517b320028fce906686ac9efe9fc2606503534bdb1866. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZW9K2450477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c275b8f76ddde8dece15e51e8966962c27d4e679b41fd66536650ed41d448fb. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZW9K2449123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfd9d390027ca0761bf4d1bb70909c3ba9c9b3e91a7093f4a7a5d3ac32f64d7f. 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/QZW9K2449391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32ed59119598a6e1050571c73f24e59bb6c6013c155ef77db7f470d0c15c1d6c. 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/QZW9K2449384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ef43c4335bb51515bfb1055672306797d92d606b09579880363840dce8e56a. 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/QZW9K2449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e16cebb8e43171d70d00363377318e397fa191ddb87080671f749cc8a3ca37. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTVM2460648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12028f1c38fbb967618243fa75d2d3e1948cdf12c9fab3be3fc74c1bfddc1f05. 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/QZNJW2469896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5edf84a20c08d14a798badf41f7148d4209ffd2057768f566c2cb9f59c0fbb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZW9K2449002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4213111d731df0dbe420aa1294afd75674a0e3d59a84d419fc24df1d3bcc41d. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/QZW9K2450481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bcccb0557632e8517cef2bc89be348303a6f14bfa35b0ab20499919df5ba5f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZW9K2450479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01763b19b470fb77b0e517b320028fce906686ac9efe9fc2606503534bdb1866. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZW9K2450477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9f71d76828192b210ae274ebf551091c3f57554c11b86e9a52f7aaa5a6e3fe. 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/GX3Q92430703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb271591324c02aa87a3e55755b27a9cfce693de15d03352390a130421a0a3d24. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/USHM82337043.
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