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 0x7d845313f121b257ea77629fefe5c209954afcf3ab45ea2903613db876a15dbd. 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/05b2e144-d7b4-4275-b355-9bc0f45a93a4.json and https://artists.proofprofile.net/proofs/artist/05b2e144-d7b4-4275-b355-9bc0f45a93a4.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 0x0052af26a8ced4f8e3333a55b6fac6edf393634b8a0d2a7991930466ad23bfa8. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/UK6J31400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478286356916be107d34104af39c636dd0fc59b2e4e0a2bde9bf08cb5e9f2af7. 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/UK6J31400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0a9772fde65d1c586d7687366e40000f87ad340b808e1ec14f314230bf58d9. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:38:57Z), 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/UK6J31400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b03d7454e2efb7c8c03588d03ac5832343985dffcf18b2ea6307c2a3065a64f. 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/UK6J31700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b6dd92513dd0b81292960ec30a2dd3f18edc2643973d026c85dd384a35af03. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/UK6J31700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9e9a73e54b397f65ba797f7b84442c43c2620c3ccedd88b4612e48c6f71818. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/UK6J31700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0954f71b9352cbc6052ce0da4edaa47e095eef3511cd556fe2a826a52860aeea. 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/UK6J31700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x674616d932d9098d6e215e371c100e46481d39bb4da2b62d500b4a9f619d7f9a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/UK6J31900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714edd00aa943b2eaac44a14694f58da992e12b6163d860f69a38e333902b0ad. 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/UK6J31900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e56ddd8775b4d37de50de4ddb1157b4d2191697bf7a8f209e461861b0bc7843. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/UK6J31900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19fea2f5bb3d561fb85824bf441c0b5b3557669aceaf38ca7ca3490f70124bb2. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:00Z), 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/UK6J32000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc51a47189d8333f45e96082ba4aa39403f8d3de9849009d613210ba897e5a55. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:35Z), 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/UK6J32200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5901cc3dd434282268879446f6519eb3c02d252d471e5598d74469c858245e91. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:48:58Z), 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/UK6J32200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c4ef55a94a4062311f784d2027629aaeb43d8facbc61f548ba0bf40f61fb14e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UK6J32300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae7a73ce0f2df12c9372bcb6d4935d9e8a175157acff79cb28c763aa19ecbf0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/UK6J32300002.