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 0xaca3cf0025f450d26169699341e3b239738cb595b76d66aedd02d0b0deaffaf1. 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/0cbc66c4-215b-44b0-9d36-6036dd564c3d.json and https://artists.proofprofile.net/proofs/artist/0cbc66c4-215b-44b0-9d36-6036dd564c3d.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 0x502a31f8e0d72cb39caf31230d329d7b459376f7248a687a901fb13d9d89c1fd. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:12:40Z), 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/BC0VJ2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd40a387c06530f7650064e6a67b7f4cec856310c2eb46b1f97aa7a20a4b16abe. 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/BC0VJ2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9504bb19cf1edd55746ca6410cd8c7c302303d4fa0070d7ac4c909e88eda2c. 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/QZNJX2304658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d86fb257a89ade78ce263cc8f5da503c8c93fd44f8e5d00cc89da195fc224de. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:10:41Z), 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/QZTPX2307013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9fafd4d514a0ff3c867fb9bccd84c45a1a37143bdc28c63ab0d8d605dbb6a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BC1GR2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5827906faafbf3eadf029c2a8806973d85afd2eb2db0103e6176ff2f674c1c43. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BKUW52500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73b4528e60972c5e6e3da3792f0f7e96c997d1d31a41e689c2825fcbc490ddc. 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/BKUW52500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bbf02043919202373dcbb961e6eda5c0eedcf2b9da88b6241bd6bf840c5fd1. 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/BC1GR2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2bbf02043919202373dcbb961e6eda5c0eedcf2b9da88b6241bd6bf840c5fd1. 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/BC1GR2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89174bf9b53779ea465f036cb33e8232993d422acae3db58a6ff4bf30a5e9602. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/BKUW52500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88711de65b7770adda81bd98c2a8d37f6ee77dd251c614154dac3395e9cea84f. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/BKUW52500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1352df739ae1ce7b8551c3e9a6dc26a795914ec3dabe729da84d3709f33b15b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/BKUW52500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cc85000a5f1c72112d10c56ecacc8d9f53267baea847b538fa67fd126a4e1f4. 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/BKUW52500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x709f6e35ee2fad6c74cfed2f03742860d442ece342c0b5d4cd952042665d7867. 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/BC1GR2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb639a95e1790a48860b8ba3902319cabab9064b94266a393f8886e7f22ef98df. 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/BC1GR2400003.