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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 0x850da4856f79258e618f232dd7fb6905dde2f6fae6e7be699f0f5b7c090527aa. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a20b4c26-ab63-4fbf-8aea-5ce0206c18d5.json and https://artists.proofprofile.net/proofs/artist/a20b4c26-ab63-4fbf-8aea-5ce0206c18d5.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 0x33858c48c7d273a0d71d6ac3c8dd36e467071d7ca056995975f1f0d131ff31e8. 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/QMFMF2204407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae644648cf8850335c4289b3c04b6b2ca812c9d66dde88539750708fe0d8bd8c. 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/QMFMF2204408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c27a089e7fffcf09a367a3cc8f23d7f51c9277e9f2d4132ec3cd48ff6a3e3be. 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/QMFMF2204410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3201d78c230c3f781f2270566e8f0cf4165d863520fd1ea138dab09c641c1a96. 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/QMFMF2204411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39a59fa853fdb2913d87cc21400de9dd6c4f3dd52320faeda3eefc97ad42ae35. 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/QMFMF2204412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86698a27e8ba5375e52714ef10810c4b4ef9d54898f9a0dd5c5b56c1cf61832b. 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/QMFMF2204413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8d233b6f270ea44f0fb5e2e303967b37ca551fdd64d8c92bc15955de21605f7. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QMFMF2204406.
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 0xa54775060f8fce46f737e70b98aebd14cb0f73b1fe868e785675b49bf1572825. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMFMF2204409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f869245879566ffc4302d036c6597b69e2b3274a9306e9b94202448c48e312. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMFMF2204414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc366f5eb38690fcff7987d843c56e960da973a5378e315789f146de2e66b3302. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFMF2204415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a327616cb0e59a4cd112d61374dbd1217598b060804d668d984dee6788747c. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QMFMF2204416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a529fc191b16b9d4c71a8eca63523646ca5835cfe5317577b28437b04c89fc1. 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/USJ3V1127612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362f79b30cc47796431f978cb5a42f66b32fdfe3a6440c3421a1e5cf8e33180d. 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/USJ3V1127613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b263d6867a3b28d1e1cdfaaf212253f3d52549b46de22b019830b96dea68a3. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-21T16:30:55Z), 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/USJ3V1127615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47150096218d41a1506d57d6d1408b1520d4b63511f4e7a95d27deffcaedbc. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/USJ3V1127617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b61fcfc5502112cc9f8405ab0929894fe195d30f2b0c202baf1e33997c682. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/USJ3V1127618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x086528ffe9da958d0789d3898e08b0fe0af9b49cf0f17d7a3e2b3db2d4610b2d. 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/USJ3V1127619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x010fcb9eb45f7cdd530be58ace1e889be74ecd3761cd8174a97e6a930fefadd5. 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/USJ3V1127620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084acffe70ea0f4e8d4cc764d7ff88b3e0bd180a7975b8716df3f10a736f5420. 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/USJ3V1127621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe25e910254aa37e9277f84f11b4527ee0c42f66efc1dcdd8b70a3c993aea13b. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USJ3V1127614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f6938359a29e79f5b352a53c445b9d39a417ea7572ce9cbf9b42f362907db61. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USJ3V1127616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b7a9bc6d8b1031461aa619660866c09a6769c525bfff6aec72314f06d4d526c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/USJ3V1127622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f741caab0a80ede2be0fdf5320fa54e94d899de51bb04d8687354b005e73ed. 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/DEAF71104639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523a80333d9d08ef70356da2dfb912a57adea37efbfec8adf249f91fa864a392. 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/DEAF71104640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7674d28c37d1702ec7dad53c194fc8c0705b7ce3236c3774de74d34375a76b80. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEAF71104643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3c24a13038ae98794d28aaf65c75cbfa6cd78bb6a891711866fe513afdde7f. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEAF71104641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86e0aa652277ee209a86c12e6e30f6f4405b42ee90ff32700fcb34c8fd03c0e6. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/DEAF71104642.