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 0x748e60f0221730a4fd37f722589b81484fd31726dc9c5f0769b48e9e5b0e78ff. 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/0a1073cf-d4f1-4f08-8720-3c4b57460945.json and https://artists.proofprofile.net/proofs/artist/0a1073cf-d4f1-4f08-8720-3c4b57460945.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 0x99dab40bdc5690f233113081d17ffe9e28c001767e8cea9d83af20e7a3336432. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FRX282280313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf19f26903fe879433510948ce25ca8b120e2849728db67e677829d741855208. 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/FRX282225529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f80d031686ddcc4c2e91bf094ffed4f1948b9f2402038607aadd20d0e20a7a7. 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/FRX282225809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3a765498966c672e4433d83e6fac1dd3b3ad9459a4242062e559ab63793a0e. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/FRX282225811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x715b583b74db21c6b2ff97e1c1471c18ef3002975c9497dc17a402b09bd30948. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FRX282225814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d70294c2ef5b82ad9f464f8c608f637d73cc037ae2e352d1b6395fff30575a2. 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/FRX282225819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62cd9b86900dab4c53d56c89e403a8c4a5e61a1dff26679eaa6b4850f36f2e0a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/FRX282225823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06985a8eb3a92fce82997f10905f7da77daf7d97e29bdcb42de4121fa5393ff9. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/FRX282225274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3edb96b6d90303f531f9b3577cbae8088dd6c76a4ababf2445df1e2a8049143. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/FRX282225939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193db51361c7c993ed17d92f6956cb732137ba24d57513bd2f9ff7ac26519f5a. 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/FRX282225940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b0ffdbb57ab6f1140f219464de614c004bbf3ace1cb2dcba25100c7d63678. 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/FRX282225888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c3b83f50723f3ecb88a207b13bef1e57e73fc5e450fa1f3ca866fca78a05e5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX282225889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1661b3eeabd32c4f8c7ba82af80037ba97abe22b47940f62bc791f038c57f399. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX282225890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b31fe7fd1000b5b5b7cb8b5141cc4d04a786e82526a134d41a90901128846ac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:52:22Z), 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/FRX282225892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ecd95790cb8172c66b8993d187fe864ed73e3867ab7045fb62059d21c77f6cd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FRX282225893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905cad974994e6e3c53ed556d401f199ea65373f38312d6b833a9770e6404071. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/FRX282225894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa685a5aa18c9d2ec1315d7aeeba7486a62b655a978d7c2a8535fa31ac22a7e. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/FRX282225891.
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 0x9f3b91f8fdc46b908837def6b9cbfc16f9fa041fc477875f50f8cfdd5a4e756b. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/FRX282225895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2daf9d012c90b56b15cd7525419d81746a6adf86f08f5b2b1ecfb052016a6405. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FRX282225896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cde0272131e570f2b20ed12fb9ef44c494f1f8e9a3c5ceb044edce5f7fec30. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/FRX282225897.