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 0x0ac7efa844b2c67a7443f069e7c1a71421827ac953d8d29f8d6e7de178eca8e0. 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/46ed7ae8-6bb5-4b85-90d1-cbc885dd04e3.json and https://artists.proofprofile.net/proofs/artist/46ed7ae8-6bb5-4b85-90d1-cbc885dd04e3.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 0xc1b9d1b102dbeae336a0d3806d2af338756ff72957dfac4031f9a4e77c9fd8b8. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QM9AA1931186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe1a27ce73a3c987fb3908ae1605816bac1e39ad5173e13e146592a0be7b6ec. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:50:47Z), 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/QM9AA1931187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205db956cfa251cc8524edc7dc9ec3f153f55363479f3d9e32b0eff4d58fb2e5. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:59:27Z), 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/QM9AA1931189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59cd4b465ffce7bf152c1b0ebf12a6a1b8c1835f3b239dbde39f3b028e4a1e74. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QM9AA1931190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae4c28e1faced2889689cced2b0df4535cde9ae29b08dd8011355a49b8a36f8. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:56:37Z), 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/USCGJ2002760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ef5b0354bcd8f3d6fed9aebbe8155335badbbefbfe0a1b4b8eb9c6cca9499b. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/QZNWU2025675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd337f0c5bea57378f3fab39b252d854515bee14188b23d8f55ad0b417e4962da. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:04Z), 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/AUMEV2139275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d950d39cb3f7e009f6a4be18ee1af2bb4ca37759273efa40aff4e5901025583. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:09:28Z), 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/AUMEV2134614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b005eb399777ab34a64fb96511ad1477e9785a5e5e4b1856452127350bdbac4. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/AUMEV2139839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770764bb07f8ad50e783452599cc1c7d2f9690e2be1df4201b063ccb1843ab04. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T18:50:45Z), 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/AUMEV2240711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5570087d9e212e609e06519b25196adb9c489c214692792ee18f564eb19f55. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/AUMEV2361028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0112b7a8d7f70bd34af9d7274f6bd9e466bb5a71bf7800fd17c871db9959d7b. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUMEV2360549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e2a3d7e16a0214ae14d54bed3176b3da38e0a973c96e7d6f95cba6f0b48268. 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/AUMEV2361030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a3791c1730a1ae7949c043b277f6d1b28ab3ff1b8533747494a11da20132184. 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/QZS7J2591984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1d3c373f549e6a6916740025755c6ae9835ac70e7781f8f0337824add7f4cce. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:45:59Z), 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/QZS7J2599379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x694c35543826794ac42a00b16ab0d593204438acf03b508fa5ccb1020104f3d8. 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/AUMEV2327202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f785e9b43df2a2a0921869d5d73fdf60a949219ef3cfa90e5fe07e35aaccfaf. 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/QZMHK2267109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb506873fe46a6e85567066d52a7634fe92a0e90a409da1fdbf1a9f138f8dd36b. 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/AUGBT2224705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dddcf38fa82120540706674a50083cc59a338c60546fd755cab69c632112c9. 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/AUMEV2336288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb97e64a721810430266437862ebaad3b0eb4f78a4c99fe8c333487233009f3f. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QM9AA1931191.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925cdbad07bda29de7bef70026124e558deca37730c5367f202e27e68b14b9ae. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/AUGBT2212665.