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 0xdf2bfd2f943116e1b18a2c89baec1c3538a447714022dbe8d942a5e43c245b6b. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3e6d940a-49f6-4c13-8703-9e8b3363d129.json and https://artists.proofprofile.net/proofs/artist/3e6d940a-49f6-4c13-8703-9e8b3363d129.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 0xd1140b4e9939b5d49ad7fa68c3953543f74070e7e8899d00286927789987a915. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52584818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d648e6b398caf125424f13718cdde9d8bd2b1778d13f02529e6b77efe05a41. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:23:22Z), 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/QT6E52584819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe142de762672ee5205bfe361ce47b3c251434276f9b8eb07732c3f557801adaa. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT6E52584820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520895cce100ae4f0112656639c7110ab400dbe1a000e444c5ff7aa0292c2662. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:59Z), 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/QT6E52584821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e08e13fca3c285a4bf43045765d04bf4f4dba57d6cd9b5c883588f6b2007ac3. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52584822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60d2c33df20f83bfdb988c536ac6076c26be713d446616365f7117f9b1cc4c1. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:37:11Z), 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/QT6E52584823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcccbdc6787f4cb92db632f24a7299b5d8991e2eac7942529b8ce85fec76deed. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T00:39:55Z), 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/QT6E52584824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf290452df7114198a458fb73d14f2e282447fa6dc38f89eba84835f8ebadc510. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QT6E52584825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ee9790d20530e0df5cf13a65e44339d251bfb0a4d92145203a2b3211e7b893. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:45:08Z), 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/QT6E52584826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f086089be9bdfe42d0c3cfe9d92960fa261a5f7799a4242b3638f0322e13a0. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:05:02Z), 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/QT6E52584827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf19638b808c21be88b566bb13b301530af99570ae04de6a309b2383c9254e6f4. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:31:22Z), 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/QT6E52584828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fd21269168f6ae6a7e8eafb62f7172f4c0c6cd8680a13bc60c64761c57700d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QT6E52584829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa612c841c23aad33c4c59a26ab21811c96f1daca4aac39f36ca7670334e8a0. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZFZ22586056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd49cc9f2ef715f992dcf8df4fc3e9be9d2ff57089c4cc2499e0ff4e81c10e2fa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ22586079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a8e8b1b32aac780364bab3f19fb4b099e44dce2996474428068c6c4aa09ed7. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFZ22586082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd0a0a3a2c6195893406d0ab36454b4178620b147e43d46bd59cb5d08a86f50. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZFZ22586087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0173c31881227edd4896bf788bcfff989009f4e0b1b9c412fbb278b37e1ba06. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZFZ22586110.