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 0x338b768ed6210eb08116455d26d6d1bf52c74b7c9275c8f4ff122333b793c608. 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/36b3f25b-5696-47aa-9dcb-5c5b6d3c75a4.json and https://artists.proofprofile.net/proofs/artist/36b3f25b-5696-47aa-9dcb-5c5b6d3c75a4.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 0xfff5bdd0ba5b7de57e49640bed01743f15dc1ee911c9ef006d355184f95882f7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/NL5UZ2300788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ee2dad1325aae3505c7f54a5e41e6612421ccd5a942df22b75dcf58f6e750. 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/NL5UZ2301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3254388da5049c06435e0508e3ac887aa02b9c2df8a42470a385e278837e0e62. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QM4TW2401157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68286bf4353d762352045979261d29675e8d8eb896da40ca71f7937396da3193. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/NL5HJ2300429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31ee2dad1325aae3505c7f54a5e41e6612421ccd5a942df22b75dcf58f6e750. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/NL5UZ2301474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20956f740e2bb0bbfc36ec6a92464f8c3ea9f969639b4b74cf204853ab287f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/NL3D82500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20956f740e2bb0bbfc36ec6a92464f8c3ea9f969639b4b74cf204853ab287f. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:00:39Z), 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/NL3D82500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f938bafeff83fade0cb260325138a38011d026796b1e3896c2659060bdca9a7. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/NL3D82500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdee15adb20cafd9d9efcab45bc6804edbe3c985a02ffb9559d6f5608c6b1c9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZDA51818505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994815b0dbb7ea991d03d8cb9b3c2b7a90c3787885ca514392ad856148688f54. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:39Z), 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/NL3D82500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20956f740e2bb0bbfc36ec6a92464f8c3ea9f969639b4b74cf204853ab287f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:04:03Z), 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/NL3D82500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f938bafeff83fade0cb260325138a38011d026796b1e3896c2659060bdca9a7. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NL3D82500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0af6688a6929b1b42a06405ec57b1f2bfbdc78c7fa7f57cea04fb4b678ec9c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QM7282499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75428903e9cd5e6d38d64d2aaf8aff37afb505f2d454cbf093a19e4878508bcc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/NL3D82500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994815b0dbb7ea991d03d8cb9b3c2b7a90c3787885ca514392ad856148688f54. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL3D82500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20956f740e2bb0bbfc36ec6a92464f8c3ea9f969639b4b74cf204853ab287f. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/NL3D82500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0af6688a6929b1b42a06405ec57b1f2bfbdc78c7fa7f57cea04fb4b678ec9c. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QM7282499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0af6688a6929b1b42a06405ec57b1f2bfbdc78c7fa7f57cea04fb4b678ec9c. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QM7282499910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f20956f740e2bb0bbfc36ec6a92464f8c3ea9f969639b4b74cf204853ab287f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/NL3D82500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6469edd2c12aabb4416dc8d5758516a06d17a70cda7c6aed27cb77a463aa8b07. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NL3D82500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd21ab0ffb372a72e2056119020e7ca3a4310a7e06ae19dbef035a15a1fb458. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/NL3D82500014.