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 0x4ad4753e43865221736d010e5757693c7c9418955305968289cfbaa81c8a129a. 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/cb6b667d-941a-4522-86be-c5e326004757.json and https://artists.proofprofile.net/proofs/artist/cb6b667d-941a-4522-86be-c5e326004757.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 0xae348d3f8b74b20a2cd136461acb0ce0ed9f4bc7f5a3f3d2fb5e547f54e98e39. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N21849149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf2d92b53286bcc567b50b348ce8934e868256066f42faf173570d7aeefa6c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBBPW2400393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f21394eddd3155876030735d77a3cc528e9b0f4127f497dad028c8ff3939a. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1898989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244a3b20da8bfc7478ce005a7a08fd71e12d7a1ec5360821291fef747a4a5623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1898985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eb47e1b2301a5773abcf098fe453cb8f63431ffec6da98ce82ac119a67788b. 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/GBKPL1898986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5552dc5d09c57a053993b25c6f70bc8afbf7e8b730e9ac1b42c5d571c0da65d. 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/GBKPL1898987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694daa453e016be2899d0ba22363861f5bdd6e6030b669b2885ea53676bc1214. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL1898988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4353dea77156fbd820c022a4436df0e75489773c85f876600d298b0369bb55da. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBKPL1796124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e4b2046d2344a797d7601e260f7c11f7b7b3099859e3d87bc32ebe189518cd. 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/GBKPL1898980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d90e2c7f69c958eb2e80191395dd59bcf4681722c6c506739b5b76e86b0ebb. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/GBKPL1898991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf765f2567927b23373a1a636e65ec4f650c01a94dce692e063a60fb001259b35. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBKPL1898992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa615483babeddaf659635de2924ceac4cfe3e176c5fe2061050c3600807f9e91. 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/GBKPL1898993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39bdd7bcd63b3df25f5ae6d812e671c6819f57ab5e862a19a853bcd01c48ab0. 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/GBKPL1898984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4063eb95630f859a1824b00bcdb70ca320e9264e8f4312b809901decc220be10. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBKPL1898982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x473741ec9641e24c4bbf057f9150872fbd2bf4769f54f36299551564ac5f8afb. 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/QM4TX2422083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd590f332d49823fd709d0d2dac83c953c322c9dc87dd8fdb35f1e5f56f962. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBEUE2200259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a2f3843a423f223168f28775f735aa73cecfa8e4bd8c375894907f1ae3224c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGH2168282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2d558a715502f06a488c84a86704e6bd9468db536a9e008fe901b35b7bec41. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBQGW1600016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb345a1600185ac26ab0da0f40d85a914b8558726f6ea421e3074179a0c0fcda. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6MZ1501635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf2d92b53286bcc567b50b348ce8934e868256066f42faf173570d7aeefa6c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GBBPW2400393.