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 0x5be4e882e292bdf80609ccf230d31e77b75c0ace6ffbfa74c545b0232c3f6d4f. 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/4d8e4e27-0790-4695-b3b5-b8bfa16e7877.json and https://artists.proofprofile.net/proofs/artist/4d8e4e27-0790-4695-b3b5-b8bfa16e7877.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 0x113298da65d3c1772e11ffcad32d53010f6da5a1982cbd9839d70600d2061fb5. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QMMUK1800096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7244d89e437f4e9b332f59c6c27355053d602fac8d973298c0816ce7251a7b90. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:55:27Z), 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/QMMUK1800097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd0eb08dd66cc9905de5e9692fa4e990ed908264bb36de9ba775aafba05c1f3. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QMMUK1800098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a508219c089772a3533c823da567b98900c2ce2440a517005ebc6a0727a674e. 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/QMMUK1800099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ebf45e291b7ad5f99222b44cb0a4bef7eff877ba9d7465af9df3ffd2370836. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:04:03Z), 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/QMMUK1800100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bad5b80dbe45da9e4ca47acdf75dd59766c9d9f9f4162c4ecd61f61c5dba13b. 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/QMMUK1800101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343c3e6f60898525ada234c7bec6c85c9c49515bf51a1f9e0144ac725ba791d3. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QMMUK1800103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e5aa6aac7a6a515d828ccbf9fcfe9ebb33845b950225efec170a61206ff3e9. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QMMUK1800104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5fd84717fdf93ad359291f2ced90424267018da1f04277fe0a17d9b0a6eb31b. 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/QMMUK1800117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e58b5058d242765d7ba8766e87c5dd16db90e628c85caf4e7ea434e97183f63. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/QZHN71945156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6a00bdb199646a0c8bf197b40b08300611d8b5724d1544fd709fe95cd44d18. 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/QZDA52045748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e03cfa4072dfe5fa05ece880e4a783bcd1df139370980904e351c0033e73d0e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZDA52002677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019988357bb4d019607d4465160620b55db0488caaa637ef0cf2390eaf7327a0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:54Z), 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/QZDA52002678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40fa491cb5a2c6e54020c891a7f505cd96e23678d2fbaca6f164cdc955a49f4. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:43:37Z), 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/QZDA52002681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1cacfe1dda6300de814e6e878fa0f637b14d6f07f2ed3641e3de6f25c37934b. 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/QZTL92115809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ca588d3bf9382facf00548c035eb610ba3400636590e118dd88338117024549. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), 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/QZTL92119843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e1e9a8af41374587d4f3e7f8d19bf71bd97926d1e95bd71534724b636f811f. 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/QZTL92194777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa613f0c6740c04cab65c23eb540fb245548a3562af97e2da28c9cf24f602e5e9. 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/RUA1D2500420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e99f0a090c4dce239dfb3fdcc3be7e89163f0351523ed9150016f522f812a3. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZW9K2364966.
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