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 0x209c72c52b02214902747e5f3cfec4860b4428617acb6644f0642f149a96ff32. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbab6a5b-3073-4523-9b63-81c91c8ff3c2.json and https://artists.proofprofile.net/proofs/artist/dbab6a5b-3073-4523-9b63-81c91c8ff3c2.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 0xe68ace16df4c84b0f2fe64403256261bfafd5bbbd10705e499d3d235252f8dd6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US3DF2259333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3ba3b922f8bcfbbf1cb6275e3478cb05ddb3227b6588852241026b6b5d6a71. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:20:05Z), 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/US3DF2259334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c17b611be49f4c03a5f9baef0892a5640f2273ec0ebe7ee1924989ff1094a2. 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/DGA0P2350891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2005f4f53bbb8b4e66f9ccbc9fed72a54d0b50a73ba1f2cf84ac2fd2aae6fc84. 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/QM3DF2421311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a376ee992e3415850bbeff02e4b224e2cf2846eac35f5de863b3f0706a3c4f7. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T09:58:53Z), 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/US3DF2408984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0978bb04cc68a1227b9a62d9f33bccf8f525fd238c4af349be3493102b06f7. 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/DGA0M2409029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee4ccaa084bffa5b35fece64bbc85f5574e98d95ff7a499686cc22c69b26267. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/USANG2451552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x069ca4b233349cb106321d2cd72d27d936f41754efc96359eeb87bae2d36c2a2. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:41:25Z), 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/USANG2449516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea470fc1200277e38d95026e54e6d632fcee7c9f2d7f7a7c58bd472804a7b92d. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/USANG2450084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcedd0895a79b3fd7175eb668a72fd8ad4965b1b5c388107aa8f26033b4d299c7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USANG2450085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b57dacb40001f7e96ea6e7603d4a013e553c8c6ed25bd84f70defc2fb499bb6. 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/US3DF2517890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91884cbec713c0532a7732b1e9832052c8b98bcabbdf4b4e0599d5e9843de51a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USANG2226706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad488aef15b13f085af42894ddc6517fc618391116c445314f11eb198df2f56. 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/FR10S2427084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb5d07066581f5fa4769aba250ba2ed31048b0f10a465f0be95e919a94bf738. 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/QMANG2243877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c7c07ff79689d38f2b9cb80a0272836af60f1d20f6565a57e695ba521b09383. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/QMANG2243878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb5d07066581f5fa4769aba250ba2ed31048b0f10a465f0be95e919a94bf738. 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/QMANG2243877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0914a501beb65c30af27a7c11de971d69a2a213b926bb32a9c89bc63427e6115. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USANG2523767.