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 0xa3cf8722d5dd3b7881ac79ea1f2f82f6d5258139e255562ac196264426a265b7. 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/82ccc00f-21f4-445c-9fd6-a6cedf2aa64a.json and https://artists.proofprofile.net/proofs/artist/82ccc00f-21f4-445c-9fd6-a6cedf2aa64a.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 0x85d1b9c722d90b443410934c9337359a3a7d34d3b69adf7b86f0a8a7e6e04c77. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:18Z), 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/TCAGS2215908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31d9141a6c254b6a77cb231b5b0446aa128b543563a8986c6620f61159cc8e3. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAGZ2394153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ca8422e5dcc646676fc76bbea3f2a01fad8717d23c9e6a737e450ab7e73b95f. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:03:41Z), 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/TCAHR2319276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36ab18b55b856917dfe29e21b48b8f2333cce7779f6e6db0a9c9ed6943c02352. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCAHR2319354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f50426f339c0cabc8845c63ef180efd3c09f37e2f27bd57ebc29af6aac60153. 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/TCAHR2319359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef5bc535c4c2547009098615181d854a2b97f3c1e8b63c96aed734b8e3abbfa. 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/TCAHR2319400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b1ce08cf8dd4fc866d07e648c80321310880c75c62d35b2a85364c24979741. 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/TCAJA2458223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c759a74accdd7be8cf4ef015c2ff4daedb5e223be3e128f3e99a93628ce5ac. 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/TCAJA2458249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0af3fd1c317c8c534e6e44a95734dcddcfc091b882ea679ba0fee7dc855990. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:30:12Z), 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/TCAJB2458300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d30ac739a08c72221f01801e142ee0697bf4507eeec27085b5059b0b7f6b39. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:26:50Z), 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/TCAJA2458309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422b51b77705cb4696166ef47356b345c281199d95fce2de51d7556b87d950d. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/TCAJU2590663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1341b49402ebc51005d05029f20967361d67e033b0cfc0ce1eb17770274d3beb. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJU2590683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c9764c71812ec1d9bc8b15219c66f4d6ca1ca00d9a21ec0da329bbb8e592a45. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJU2590694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c933191e271d5e57f3f2561e39088195d9f8d45c65cd0567806fbef4bb969b. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:20:23Z), 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/TCAJV2590703.