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 0x255917797ffea5b6d06699de14d4750589974cdcb1873c3a0c5867da07ce6ee0. 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/88c1e353-bd1e-49ee-8c1a-4085bda2360a.json and https://artists.proofprofile.net/proofs/artist/88c1e353-bd1e-49ee-8c1a-4085bda2360a.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 0xcc08d23078424b8b1b275ea9734eba8450c946f208eb9fcd2469cd82677f3f2d. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMEZE2095163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b439ef5a808646df09bcff945cf929e335a694b01846d5c38ba2554ba639ff7. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/QMEZE2051220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67910ebe5f6f0212b561a58a8ad7f8a91fc87fb574c1c1816948960b62dbad8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMEZE2095942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86785509c8178987b3914df6c7e8db2e33170a335f83574ac6d00d901e4e67df. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:58:20Z), 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/GBRKQ2113256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc4e8d55b519c77447772f27bb895268ed6b577e4aead3bcf88429fd52a9be85. 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/TCAGA2266478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9bcc2733da15efb134957958a5a8dec3b307835387af64d289509debfe8754. 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/QMFME2359811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517c330006c92854c14f4e497326a8b19a2401c8b2075faebc232e8d11f24b73. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/QMFME2359813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d75ff389340a0b9b48602d3218dd8885716938b43893f8eaa52c65859662a29. 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/QMFME2359815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2853962261512843494cd16bfc8420f5a2dbaa3914c3c02be84a367b9fc2ba0. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-20T12:05:22Z), 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/QMFME2359817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4841ecd2b68c01cb4424471e58d2229cdff90a2b3e0d8dbe4f22b64b336d72be. 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/QMFME2359978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec841d19d440aaacbb15a581c21e3ab325913494d0b74dc331d55c1b2a6bbc07. 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/QMFME2359992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x053c5dd1bb7c524346c893262921798dc7b8b24c0869b519c3d4da42f7c99db0. 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/QZTB72329356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a36633d083a309259a3ee7ef7e5f460dbeeef0b0521f4b50537251561b7fc. 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/QMFME2381344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a037aa2add7490a4f6f5c6e827d0149ac2f7266c9598ab5ce1ce19a0f90dc1c. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/QMFME2383100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf48a04b2abd8f1ad8166199fec07a832bc1857415c4b2670923b30fb2fdf353. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QMFME2383101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a451d6353e83c606349c8af7f302c792933cffbfc5a464837cd2dda27d87d09. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QM4TW2479365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6428b62f923bc0dd166089e3c7ee552f0d014905ecb6a4a729aa47892cccc80d. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZTB72329357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2e8bc9f67a37854b76f6f2a2a6fee7d01d7775c2d15de0664b57b8436a501e. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:08:22Z), 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/BK4DA2452779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd93c6789ab7d13b7cbce033757ba44ec43c1f76c33fed6825f5eadbba4bdf. 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/QZTPX2574383.