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 0x84ee6ad41a5372d2ccf44837f88bcba3f200ef8de2624fd532b02ed4a76d6735. 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/bb33e4b0-9d31-4785-b690-af7e02b9ec32.json and https://artists.proofprofile.net/proofs/artist/bb33e4b0-9d31-4785-b690-af7e02b9ec32.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 0xdb46f40259f87e01122675f374c0a00e420570a59b9b64301b28460ea70c4d1a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:38Z), 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/SIA631201921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927505b5b57d93d9f8f0001d8b7f744d8573eb7d2c587810efc49578ed734427. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/SIA631101534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2d1a0299dfdf8c4f830f809066e5f3e1c81c800a6ffee2c5283b868865d1d5. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:18:57Z), 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/SIA631101540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94a1dfb3d341ee36c9f17e93c960b25a5cf2ef608495a514feb52fed7123d3f5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SID050300237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4706d00b4a4b80d1a98cfe1feaff246270c32fede0892e1b591c4df46d6d0e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:33:04Z), 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/SID050300233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708bad97fcc6fb9a5fa683e9d764b64cf9dfa92d19735694e89133271cf93e1e. Chain 2 (Bitcoin): anchored in block 957535 (2026-07-11T07:11:01Z), 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/SIA421500057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a96535ae73743fa1330287bdf846b84ece3eb1755d66b26a5372019561087d. 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/SIA421500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x381c145c273609ef321d1655b669ae8c4ebc7cdd43a8936b47fa4c991ab207c5. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:59:25Z), 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/SIA421500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fbc2305dbbf09281079a5b03a67257ea302c595f5e4f98425d3ec129898bb01. 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/SIA421500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf05d2cba905dff8c6e41a31226016aeeef07096bfb00604317104636945287. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SIA631800179.