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 0xdc521443c4a202f43663b73492577ba59e9ee8211a51e608b7c49d22d1516152. 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/15b96ce8-7923-44ca-9eab-835c4ec6189b.json and https://artists.proofprofile.net/proofs/artist/15b96ce8-7923-44ca-9eab-835c4ec6189b.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 0x30710d2ddb48346ecf952deda6680356ee1e62cf44bfaecea567ffc0576afaaa. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFYY1909504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b90ca1027c6fc76092737fe5ce401e5e157cd273632cfde7525c77c56475a5. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZFYY1910859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f183f16c2f7151705eaa8f7496dcbc3e4f606b0c7b7b7c61d9d2bd2cd1e319. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZFYY1908604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e228837297990d439ce364b779fcef6c08e8654dbf36fcb18f7e02780191735. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZFYX1969264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfe1138bbd7000feba10274c61fe62295d8776bf06a1ef49d8a64fcb11dfec2. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:35:37Z), 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/QZFYX1969265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb5ff19c91acd849528f5226f07c99a9f4b0cc4e5072f1cadf4301bb5edbc9c1. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZFYX1969266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3422563e583ac9046611eddbe572b627496cad0ebef97969aaba7eeb8f8a8c55. 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/QZFYX1969269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6eb5fbb558093d14e7f574958bb1ea3675f9d41faf9fdb2fd2acbe38fe861ce. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/QZFYX1953303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2adcf2c7e3381f2dbc877f81ef11b947fb2749cdebc6ef2c6b0a811170ef4b5. 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/QZFYX1953306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e02cf29baedb84f935aba40f400dd61c4db77a3f6ee88623d9047cd2faeb0. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYX1952379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94a2b55c9e1e8bfe76f5324db7d317ab95e78a944f1fb4f4a256648438ab146. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZFYX1952381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5001ea551cf5d0b338eff18a45de00bfdb9db7de98ae4aedf1d5a07b0472cd03. 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/QZFYX1952388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26f612e659d9b00d2200020b672263d7e6162f29133543bdf705eeebe2988bd2. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZFYX1952390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b6e9a76050541259d3a671348b5b5e3900827d6d22e82d0d43733eba522746. 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/QZHNA1967213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b68cfd04094c10f9c20c192989f0b5f6a1396e08a080c5bef471f904bf3b981. 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/QZK6J2161640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc359bb70c2cb02ac4b40dac1669d6bd0821d98c0a50e4558605f1ff384e9d1fe. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:45Z), 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/QZHN82209465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7e939ec1bf500490ca34dac5b88f8547070f2605903acb9b8004a85cc892f. 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/QZK6P2434216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ee281a3c12a5913a64a1c34a65c991d18068669b12177263e1e3006ab0fb2e4. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:53:30Z), 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/QZNWW2488256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e035865a5e280698fe02fa8811c962c792a2b90c0eccc52a994b721d0e62ad4. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ7X2404799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99b8b4c89b4b1d95c3f0836623b22abae6b6a18d3eb77712946835f0848cb9b. 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/QZTBC2573446.