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 0xfb1064e127308ff0811523e2570b5e39a332a564755cef90741e444f921ae92a. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aada8360-25c9-4e7c-a07e-fdf24610c986.json and https://artists.proofprofile.net/proofs/artist/aada8360-25c9-4e7c-a07e-fdf24610c986.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 0x6b1ec022e5ef973493e2f4ded69912b862fb378b63d5778a2d412d78389335bd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/FR0Z50038031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf318bcb82d515ce09a75a0a21dcd96af3a0ef13c8c33c52a429f526578fa6. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/FR0Z50038214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaf2b7e034acd6174def1024a4f59c56aabd407b08dfbfac218e5b956a0693af. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/FR0Z50059501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5555baebc4bd704cb60ec7b259bcbcf858a8a493097cbe42068067b44706df. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:01:24Z), 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/FR0Z50096482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbee9d18620b92905a39c8f859673f21450b932775498a36429512fe1f6ffbc. 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/FR0Z50096484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc5f67087811b88f4bdb83773fe1ad0ab25237025cf699374b4cbe9c57ff072. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/FR0Z50096489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaadc60aa7c7f2c5beada8fe7b6b42bbc7126f2ea506257f8e1a93e4258630942. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR0Z50096493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa670cecfaec7fa0d56edfb16c917ec83d7cec7a2a4e3996d544e6f6d92dd6693. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJY2319692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9243bd28a173b6452c05aa41d0aaa4ec781bcccc1dd3f57b2a60d0d504bae281. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:05:30Z), 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/FR0Z50107078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc165568ca11b3be517a2677906e7e3d56e47822620987b9fe44ad1faad33a34e. 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/FR0Z50112282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3f9768702c2c515660cb4e44b245c5380619d94fe6a55baa8cae557e7e218f. 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/FR0Z50114264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8522c23b14a9ee8660687b67ad8dd81985ececf6402307d9877d5eebc58ef68. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:05:24Z), 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/FR0Z50114268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa00c705aae9c49a5480c52e4812ccd667e139d306de5c37c81d0099480421. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/FR0Z50114267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47e215330f9187816ddd48e2e6dddd7a124a492d2af64317333584c288bf228. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FR0Z50117818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7f9fd7ed48f26236e98aa27bbe536f49dd6b45d49939d4192b536b29b1f6961. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FR0Z50119289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c121de372397132793deff63ce7983f9cd80d818d07a28f86b738cd553ccc4. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FR0Z50066100.