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 0x98c6b73d72188e23aabf6946d02e93d5463bc0217b3eadc8be87147822a55a7e. 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/fa4d85df-ce6e-4870-b65e-7bf9c91ab0e7.json and https://artists.proofprofile.net/proofs/artist/fa4d85df-ce6e-4870-b65e-7bf9c91ab0e7.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 0xf4f6c27b4b59df9daeb7555036b4c05e5c926047871456963d9657b2547ad8c5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCACN1629206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e628342a14925303e01b75ab78d090e5e3516782eb538e9180832fabb5e0d4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/TCACN1629209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc8570dc0f193b60d411609c1514adc428cba1f6e3ba7ebd465a33b7ed0b9e83. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:29:25Z), 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/TCACN1629211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b558a6c172ba521a3b61be84b67ac2511ce14040a2c754c830ab62e2c6d5347. 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/TCACN1629212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3015a7cb6ed491f46e88d341d3211d42b3a52682d0bef84cab4e73ba97c6c13c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2092872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872346675aa527c6e5f63d96fced668bc3111ae902316c8d13ff0529e4f51dba. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZGLS2092869.
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 0x0440e340e0f7d27f525b043c47d9a25e91a60cbe7d537cfa616aa8285358b962. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZGLS2092873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc135d9c103614d08686f626516421c27436749732ebd38bd52e7c503f10e68ce. 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/TCACN1688594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b0b4f85444d8f80bb9ad80d9fa9cbe9a824ea6f1f8358d7f0e7d11dd7106c9. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCACN1688597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffea915ac5b9df8f7e1949c2f2e054237677891a6a78b8fe2c2d8922614a99e3. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCACN1688601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd606fe92659741ace8e1455749aec4f89adb43be7b23435ea896884b1d7e7209. 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/QZHZ41990601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46f208eb83226d7e19c344a78761036e9659dabbdd3dedc3d042d30e8217557. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:35:54Z), 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/QZGLM2016183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1414722a404b81dc5bade007be5c95600c2267b66286931c23bf078e96601ebb. 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/QZNJY2141396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb1a5b7555c5a1a917656de041b50dd5f48108ab79dacb1af14b266df83e579. 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/QZHZ52245959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c32d50af987d0c3bbb3b11e91a99a4dbd6162f89c6d578193ad1135ca4b689. 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/QZNJW2450310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf495ff1599ffca925a4575d4c721dbc693e04fb80bcd3a77235af4f966c56e77. 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/QT65X2587983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86c630c92ddb94ca2a6e0fec9f338fb405af6c3a5c4b40abcc5a3a3cbce473ac. 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/QZNJY2042936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6071255c4328aefa87d1126f78f7cc7960013142c316c4c8fbd9f92181bd6e5c. 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/QZHZ51905481.