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 0x184c5880acdde7530f6df8b38607f09bca1100f03a35f7e4b608a44e9c602332. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1488436-9a19-4f03-9d9c-61ecfcfb1c6b.json and https://artists.proofprofile.net/proofs/artist/b1488436-9a19-4f03-9d9c-61ecfcfb1c6b.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 0x6321136ef4794d0e056a1e47a525e74fd4f2c247664e61726474077272a4ab06. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/ARRUB1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7044b80798d2ace315d7a693f873537bd6cb6bad80220a7917022ff54ead9e6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARRUB1800001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f7d58ab3f5b0557eb12d9d5940b93a2b1c7574e71a3899cc8eeab97195864d0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/ARRUB1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf494c56e92cff9d3a00554d1958aae923c504f03348dfeebca00120e1cf82a18. 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/ARRUB1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66dd2dfe166d56719047d04e674aeb48b1a2aa133dc48f299c66ee4f7ea3ea34. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ARRUB1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb84e5b32b5f735aa487bfb579b694e28e6b7e8bd356a1a515050ab2a3d36067. 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/ARRUB1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x356d863e36691f4762d3ae37836601a24e95c7d064cfdcf65e0749883cafdadd. Chain 2 (Bitcoin): anchored in block 957522 (2026-07-11T04:46:56Z), 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/ARRUB1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d7daa37989dbe5585ce914494de711ca22c55dcfd31e90d8d714ffc99246c4. 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/ARRUB1800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c057fa374a7f59233d0736741c63e6728cc90ab7b3baad20af8f4492b8890a. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ARRUB1800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b46c50fa4273dac1214cbaa5cc6c6ff976ff7b5b9a63c85e70beebeb26917de. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ARRUB2200003.
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