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 0xcaca012c6dfd054380f15a4f1b1b31fa7bf0a67f3c54b637b0c79300c5ea8943. 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/ac73fb69-64c2-4683-8a67-d2a22ccfa5b4.json and https://artists.proofprofile.net/proofs/artist/ac73fb69-64c2-4683-8a67-d2a22ccfa5b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Entre papeles y tinta (Suena a reggae), Vol. 3
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 0x702930b1ff33ff665bb5f3f6d7c002675c732ff4a7168f9795fb8bd6464f6f23. 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/USA2P2355796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c109ad3123ba4f90055f1d7e39107ffa380b3a2dda95c3dcbcb899c2d6e2c11. 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/ES71G2403725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6e58a660100f82172c3a29f124b30395055d91a201e58e08316b02a39a2de8e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES71G1932384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bd9c25590139409f57c13661f7e764105f65af98faf7d2fb2d334f925c6551. 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/ES71G2310673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x779229143a3be5fc4f3d8d7588c18c32ae429ffe6bfc77bf821465f43948eff0. 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/ES71G2242833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ccf39a6bd89f5a761d20c37372c43d0d56bd78060dce012e6b126c4bef6bfa. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/ES64E2204544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51136ec15bb61abee2b0df2c2d1c838cdf40152a477441475815062d369964ee. 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/USA2P2244844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9fc6284cd91090c54a9b09f4f76d26134267063b5f132c7f792c0a90830335. 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/ES71G2225328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc60937f1afb0c5c9f06a24bc48719ab28898043c7c22ac4d29e3dca07c2e98d. 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/ES64E2202521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cc80f8dc5ce9233e863b7d77ec2a31a61cbafb3c89f3d6444ebf03a2e28ac66. 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/ES64E2202675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75757319485b8b70e4bde22a5a111771f6bc64696a19c7404a4ef48aa5b0a1e7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/ES64E2100041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59deab2a47be69c0a42bb4f6b9ddc29629c642b939320f087563af3f3523d4f2. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/ES71G1951258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc827daa45052e49cd28d073b777e213fea0d3a03ec2cfac45f6582aae65931a. 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/ES71G1932771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4817aac90d2d0571ec39b6acac7e7c2d144213e209f613aca59c73f56e6d644f. 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/QM4TX1942401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34b8b52ec7d1b0a9081ef8f3eb7ef0da427c5cc1b892656beaa7204970f3edd. 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/QM4TW1927704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb04b46a5bfaa0615f0d91ebdd71c8abe91a8f7f0f716e16ea66db08aa4ff90e8. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/ES71G1824170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d6496017e1d3a7a9f0c30a7554e5e5ff77d86e2ed73cdc161727c0399ae0ef. 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/ES71G1824171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da1aaa0e4a30d0998635f79f3cddbffe2ce22d6f1f2a0a3fbb87bb3281b83bf. 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/ES71G1824174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730e0cfc957f2873c47847ad1c9326d8c1c281bc9c624cbb665c546e45937762. 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/QZHZ32265073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44105ced271badbbd2f09672937547027d7970deeb0c9c74a372497ceb36d808. 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/BK4DA2413581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1aadb309923cd982849745926f175d7ed733faaf43f7231bd7ff7736e9e333. 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/ES64E2312041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9093b8e29e6ca1946c49e9dd8936677c843b156ba9b4bc1abe433cf514c7c527. 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/ESA011691232.