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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 0x263538fc4d81d5db749a079516ac983fa1817e761aa437fa079cd87f622e64f4. 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/7a9b24ac-9a02-44e5-b910-b9efe0055b5a.json and https://artists.proofprofile.net/proofs/artist/7a9b24ac-9a02-44e5-b910-b9efe0055b5a.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 0x06f9160e0ed3ef19caad0a6e0fffeee677a9b456975bbf3fd25c0d484e835949. 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/USYBL2000510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdbcf5c8c24cf72a96238b723556c05433d178ce19779e0341a4bea38604b35. 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/USYBL2000511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5f412a78b6abf22a6a69adfdeae9bb220aad3b35dc8d3e51497f8ef70362fb3. 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/USYBL2000509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61da648051f7de992fa1a6308b81ab6bd03c21822632d81d6c11941af15fd1fa. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM24S2009217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fcf77b4f6c5cdab32d1efe3e40950d1253ea26f7efb96e864a6d6bbdb03fb5d. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USYBL2101073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c6c1aee827c5a84b071eb8bf66c01bfb715c0e6b4b6fa262b36384332eec71. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USYBL2101072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0368d26837d5ae369336af6fe657560c6887a9fe54e8807b31bd0a598ee2a72f. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/QZFPL2100109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4834a4ef364ba2fc0a52ff71ccb8d66e2ef45211280a27721b5e40b88896d5. 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/GBLV62121458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71579671d10ff4e2ae429428c7f702618deef37bcb7601680362b200111d251. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZFPL2100179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23dfa5c904ebc714c0f4776f5cbfd1b488b8f0665bed1956e615c8ae12ec3e1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/US39N2203682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591ab165810f6ada91a924a3233d18ead08c3f12e14094fcf65f765ccf65c9ec. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZFPL2100336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2cde6eaa5efa08e1e8272181b0597288318a2e2705829410f6e6b927e14f69e. 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/QZFPL2100414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d0fc5c125e17c435db68e266281bfba85bb6d42694ff8c70a0598a77f5a212. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CAUM82300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7418303a419bbe31884dbec42e583aab6e703e789645e1c864fb94613504a2. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:15:07Z), 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/QZUCN2201989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x666d3703394624f8939a92392a93d0c61e702bb454f6e80eacf899322a87b853. 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/USAT22103066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f95f813716fc4e97ae3691bcf0b72bf46307f9b4b43e61a766fc2ac1e6b1ed4. 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/USYBL1801176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bc63a7a69e6dcd3fbd294720788469252c1b80fc2341087c56a9a2257af5d9. 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/USDM31688102.