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 0x0202b871365db702005d23c5cee65356f326a62620390f357d53b277b0fd9f87. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5380a30c-2c1d-43d5-88b8-e8e9a76b4fae.json and https://artists.proofprofile.net/proofs/artist/5380a30c-2c1d-43d5-88b8-e8e9a76b4fae.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 0xe79281702497bce27e478cceea43a459d24f973203a9bf156b9f0e2ed74cbd4a. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/BGA471910455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6371f3a241450f1f70ecebe11bffd8a114da3ad3d32cce9a4cd78394628c0650. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/BGA471910456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ada8ab3847387734d60c2ea4a02828fe186b15f7155ba8924ab33133fe8bb2b. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/BGA471910457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbbbbbf0888463ec65c33beb96651ab800080196fee16c3d203da1f7d95dc47. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/BGA471910458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063e756a7a11d2fe2ebfabbf9205d99699a5cd9b7bf427b83a51e4cddb4a332f. 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/BGA471910459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d26c0d2b932dcc9482d7bf899753653ab27a6583a8371bd021cf9bd61c736ff. 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/BGA471910460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeccbfb57bcdc7d430f77a6f27191c134cc6f253ad1bcdab87036cacb4d07f9ee. 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/BGA471910461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x849536c410c179b1de37a6c0bf29a14d257bbf351c3d0fc01ae3b4415c247acf. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BGA471910462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd34173592163e9aea450f54f9c47b73cb632d89db5b606038af2788c499f88. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/BGA471910463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3b17172ba12a25e3756912c3e8f4c91d55057acbad9d83a9c920e9e4a9943. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BGA471910464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94cd1510a386282feae0a817f7bd2b7a672e52f8284deb38de2498a5f95af6d. 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/BGA471910465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60074e2f8382c692d61f4d5735c5dedf11caaa375af4ff6f906096d1e0d39af3. 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/BGA471910466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38ddbb8415276e148b266a4241dba17320721662080d43a1c4479c55e9670da. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BGA471910467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c701c6ddaecc070b8df197996bf1668512ad6d5edc63499342e1730d7d1b4c. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/BGA471910468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463ab9577e2b45c57b8dbe8d40db4a35104e61ef4c6bfc05fb3e73eeeed3ad40. 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/BGA471910469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f1aed3dd2bd3b68818d7b88e80080ef0893854c41aa50a914e2f5f68a18cc0. 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/BGA471910470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b0f9bd95aeeb55cc4424e0e60a42621428543ebee7d74b9aff5515ecd22df1. 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/BGA471910471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82efdd735cf5e8ede0edfae9f4eee0b4d80066d2b4ca11d6d99a3f40c89fe7ab. 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/BGA471910472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44392493affe1b81f019e616cde83de6d70c30ee4c910dd70fe5c59276ffb0d7. 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/BGA471910473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dd94f0465072af42c7b2ae2140b5c9c1a8033ea979c83d5032271339016a8e9. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/BGA471910474.
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