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 0x605789248d33e08a2b905a350259b0012cda2b854014ca90ecb25ae53c68e6bd. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/215d85cf-0bae-4651-9a9b-5e4cedc5caff.json and https://artists.proofprofile.net/proofs/artist/215d85cf-0bae-4651-9a9b-5e4cedc5caff.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 0xf71e48a18ee11976b389c816c3a4593f04f3c69ece9122b4fc1c1c2c7a615711. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/HKK972222492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d63a51adbeb7723a4eba2a8c8dbf7b0e5b12e26cd22cc542207f0eb10781ff. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/HKK972222813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7eaf4d18d7c370eefde4293b456b21f23ea11bbc1a2eabc5785df8a3127c904. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:04:19Z), 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/HKK972223901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c80678d6691a107bdf2452c856e7cb845a28434f4586a64b205fd025e1267dd. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/HKK972229819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7f6506bf59cdcf71b95a0aeacfe6aa9c880dfc69560ed21e9c68783e665201. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/HKK972231161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59c65db2723708b064da0383ea512d275dd3707339598fbd6e5eaada91dc50b. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:15:32Z), 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/HKK972233446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3c8dff757baeb4aca333c4635b3c2d6210f1351aaec3e126ed4737cb037fe8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:34:12Z), 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/QZWBE2270788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc300f45f044d9742fb8c73dd365f2c4e9db69f7e87e20d8e20965e9c50a45178. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T01:02:39Z), 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/QZYHM2333989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea317cfb29a21eff9d63bcfa7c61339e498004e449bfda41708c327725eed17. 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/FR2X42484756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3207bb70fb76d2fbb43af5d5a311ddbc863af20466c39032ad4cc39468774ad. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR10S2584584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be1fd08aee6536a7b1e24c475abd721b0a84ed4a8521c5d326e1d48abcc65cb. 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/FR2X42524364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a70478ba3627511c2dd40821c35bd70b31d7c93c166478cacd88473c84e6097. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR2X42524306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61886b6b89e627fbb9ca9387a18cb113073d6807a6f95426c0cad0e8b8e36d44. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:05:20Z), 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/FRX762542811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a3fe996c8b482ce80f7a1a0ba8c7d49ad7410d373faa11a601f37a97536189e. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:54:35Z), 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/FRX872526520.