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 0x79b456cfa4d96d02f1213775504b81f1de4b0b6c656f9081ae2f7c665dcecb94. Chain 2 (Bitcoin): anchored in block 953706 (2026-06-14T23:14:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c198767-eb2a-403b-830f-d17e5e8b1950.json and https://artists.proofprofile.net/proofs/artist/7c198767-eb2a-403b-830f-d17e5e8b1950.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 0x6b3e834b74df15cc4e184769808ebae323acdaea41479f9329c634ae38dab4c3. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES5021702674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65b66296d2adb3e81f5781432f882b2e79b46f9a9300fa8c4960e534361d6e9. Chain 2 (Bitcoin): anchored in block 957057 (2026-07-07T15:21:38Z), 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/ES5021702675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc663f12138655e06a53350b231930c0954e104a61206903cdac4adc92ac3078f. 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/ES5021702676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b2f0e77a0da3305c7a65efdb48f0528de065b124e0d6238250c983a72e9f82. 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/ES5021702677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dfa0b9e765fc3e3ef60ceb2b130894b1ee1057bf273599185ee25cea6cee2c6. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5021702678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59431fbc5fa61360cec5743d91e999d6932654488d19989967bfadfea03f0a4. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ES5021702679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d62a3baacbc32f3637ee5182cc551d7140ce444e216ea42a45b52d1ab79d99. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES5021702680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6333500074cd5670aec229738b555347a17bf84c2dede933072c506c13aa0763. 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/ES5021702681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0552df91b0ad2e46acd379b839dadbd0427fbb1c37b94653cde97911defc9c0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/ES5021702682.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4df3fbaa4a20b61c5b7634c12f62aadfd294e055e6d17bb35c17b9d2621bb6. 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/ES5021702683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff130770781f5dc420ecc3c9166cc20a0e841ed2c5627ed48f0369d8c46a676. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/ES5021702684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295152f40e3632bfe35751cea33f341c2e99b0b248cf142591d1270cff538f8e. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ES5021702685.
Summertime (From the Opera "Porgy And Bess") - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d371c1a21ada3593a14e125990bd09da82388b13fe15dbc8ca8edcec2a8df1. 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/ES5021702686.
Over the Rainbow (From "El Mago De Oz") - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e4a66d13b30c2921bbb39b93a986fe05b750b75caae342e569a9610c5e41b33. 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/ES5021702687.
No Llores por Mí Argentina (From "Evita") - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a8a04e5911f1a4af8f18c0ac98e7d7087d073f1a459360dfa2cbdde6d98f763. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5021702688.