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 0x27ee9835503d6b28919844efdcf17345c1ad199f0a1ffe3c2c9b6ec8c16fc0c1. 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/90888aac-5188-4110-b067-5ed7b989ce9c.json and https://artists.proofprofile.net/proofs/artist/90888aac-5188-4110-b067-5ed7b989ce9c.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 0x52b36737a8974d24af0f1d604eaa48578f1606e7c8573a6986adbb0ff7869f49. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZZ7L2449084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x660f684e8fb48cb8416dceb0afd197a631d7a85ddf78eddd65b537c77538ff0a. 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/QZZ7L2449088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17435278a483e1963e3bbc8c36dc01d2b489085e80660ea32593e6200b9ef4d7. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:07:28Z), 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/ATBK71200310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014872b07004bd5018206ffa74521eb0a9b904497a4370edccae31ea1506a4ec. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/ATBK71200311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a76cee8ce06ab357bf26ca410201548f1abd863c5a591981b55676e3414f6a. 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/ATBK71200312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfa8bb651c2b0ec85f141ea05e77035847e03de27fe64ef8ca4c1fbe08cbdcbd. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/ATBK71200313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bf3d686e24029634bc311f38148ed66778db0f839d564ebde5a794a9c7da76. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ATBK71200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa113f5a300c1c588f4d5e6df21df3facaa626a43361354c3b70a2aa45e2143ad. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/ATBK71203121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401f9e7b0097e965b15720d9d4d3f377c883f1ba2fac004d29c82df68ab49e87. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/ATBK71203122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f626230403dc6d1ede77218ab02984f23ef674487e0d9802db02bf5c5a34492. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/ATBK71203124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c920d9c7b13e9250000292da451ebd3d33589a505c68aabdfe8534527709bda. 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/ATBK71203126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9405367df58c47cb114fe652e27c81f4f3bfba74295f8bfa0dd64e945f3c6d37. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/ATBK71203127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346ca41e6706e76c44eb7e020ace95affbc91f9ae374889c1f9db35f75fc0208. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ATBK71203652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b560d7824030d13ab53f028c68f96801a6fca712528855a56018eb0e96931c3. 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/ATBK71204611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948ac804d22cb1cdf01d801e776d28e5ee743f31cbee3efc6112b83cfcc4f98a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:03Z), 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/ATBK71204612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d24d9a7376a677cb97b5dc9afeac0241fcdec36471b3a9cce799d99dc9e089a. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:46:47Z), 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/ATBK71204613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a52d396f72e905b0a733c66e77c2659e16524ace3339a6f82929f6e64f667f. 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/ATBK71204619.