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 0xaf11921685fe7412a31373fe1b891e7b5667ac3c1331c33cda71827f44390fbd. Chain 2 (Bitcoin): anchored in block 953610 (2026-06-14T07:58:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14d854a7-a645-4bac-a1ce-8be0d8bd7fdc.json and https://artists.proofprofile.net/proofs/artist/14d854a7-a645-4bac-a1ce-8be0d8bd7fdc.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 0x2455899ce5af75cd1b1235fd14dacae3e60c781734af31c2afe404820517d8f2. 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/USL4Q2191584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c59e38021c405a85a238a39c90a7db7b4a9cdd2e059e38729100271c366ff16. 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/USDY42158739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb1d3b0a6bcf81489eb2f94356c1ca587b0dd775c6c7cbd0a9154fae7cc9634. 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/USDY42158740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6471b6700d48b4b5c5d27635ed5fc2029f084b90a741dadaab949e224aef0e5f. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:49:09Z), 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/USDY42158741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d040624165cd86ab9d1f8e5b5c1e91305f3e0cb8fb775532b7dd117e834632. 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/USL4Q2191582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2455899ce5af75cd1b1235fd14dacae3e60c781734af31c2afe404820517d8f2. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USL4Q2191584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e999758fe6e1ef7c6d3b5d41e7ab1b5f617b913b441e3b8ea3ee6a59986219e. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USCGJ2244087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90c3a52851a923e9971c7779e91b0598b089b89cdf51ffa286fc38c20337dd9. 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/USCGJ2244088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db4b1d2489388d5b21d2838b9d462f5dcb30e4bf1ade0008b00cc3a7188f121. 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/USCGJ2244089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671ccf49c4470689506262b6fcfe8fac1362543d24dc8534c4e45605c3d3d009. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USL4Q2270729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc500b42985a9f3909513514fdb96603a0a68fc026706def8b138602b3fe7316. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/ARYSP2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afaa28d89bd9e27f3d30b30f3449c10182b571fc9718c353f39a417fb4c16da. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/ARYSP2400041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f0ce1b1153171897b951484dbcb2a7308a3789de21dd3b927a1dc944648e0d. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ARYSP2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b28c164c9dcea5166677971a2d44a1c28a1972677b1f61e7afbfdf66c4c6f4. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/ARYSP2500043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa7f9065e5079a6202125a0ee85f1e754bc4bd53b37307d594b75eefbde6511. 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/ARYSP2500044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5193aa656bb61f0db93e87f3f3c77d0880082b3b40319b582b07d92625267130. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ARYSP2500042.