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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 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 0xebb6432a1e984c7d0625bf68cc7dc14457fa3d6b4610b528ae9cc603f83c63ab. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92f7fe97-ed1d-4a08-be3e-fee353caa2e6.json and https://artists.proofprofile.net/proofs/artist/92f7fe97-ed1d-4a08-be3e-fee353caa2e6.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 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 0xf3d2b012d4b33c24ca2d43cd359b8d0656c59c9602b30729ab06c1a009cf9fd8. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/US2X60400391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa762e767fd8ee55bb82648bc66441aff4acdcad5313936c64c34a0b4a062e3. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US2X60400392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d98cc0a63bfc9df041e140ed56e4aaae29b823d05419a8b297895f8d904a640. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/US2X60400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc854bc54616f645598e67eac770ddca7bfdc9c189755d6df8a8c25c7cf816f0f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/US2X60400397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533bd31e9f0b406e7859fada4ef66e4c530710d905142e3ca8fd6439aba34187. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T09:11:53Z), 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/US2X60400399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f286dc669091579da5af1862309b1d8d3946a6d30e98a96579d164118473694. 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/US2X60400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d0e7fc5afce03029d7e2b99b9493f0297dfbb6094c77b76ef358d3cfd761ee. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US2X60400404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f17ed74041c5a8db64fb925d7bc2d7227f4fa78e8d7a93eb7eff6e0bff7659. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QMLD61408214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79e5289955e082fe8056d38cc83d5d51fdea4e3767fd04762884f00a0a159b9. 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/QZSYP2349806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07bd71bf23dd532aca280f4d35d337494837e697ddbb7bddab7ee5d50376a7f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZSYP2388766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79e5289955e082fe8056d38cc83d5d51fdea4e3767fd04762884f00a0a159b9. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZSYP2349806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fd064dc18fa92552777eb15e8e90c9c6d6ba454a17ee06f86e6f3cdbe323a6. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T05:07:11Z), 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/QZSYP2370221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7c29e67bc9fa0e90e19c27fc0ebe0924f71618b185014ddc575b85380d410d. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZSYP2337090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fa34e1564dddff066cebd3b64cdfa3acd2d99db4ce839a0f6199e06f210536. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/QZSYP2305295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa918b9d3c9eaa436836e36f38ed6b08601aa03ce2e2519b9d58ef4024a12de3a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZSYP2314959.
Chainsmoker (Twiztid's Version) [Maxi Single]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18456150e0baf731ed84d36e6eae08db71d175157861525726d7401d889a5c6c. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/QZSYP2530315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec80b0b3bc915e0798e51e166710a8c1f889263302bfd9808a3d02188ac12f8c. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZSYP2573485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2074507deba6dd1ec943a675a8211ae2010e8fbc965cd454151f72cbc85e31ad. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZSYP2508794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137d316c01ed519075943369532abca08f4412b53a79e9de25e626a3d6176586. 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/QMLD61404303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x614b633924e4c432b0a750127c0a9c01b13a53c7535f6aa1a17d3c1399f14d36. 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/QMLD61408221.