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 0x5b1a84c2fbc87258081d2deea9d81da7b5a203db74b812fb0c69e736ab939859. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f696e264-dc36-4dbe-a74a-d4b0c03d91f8.json and https://artists.proofprofile.net/proofs/artist/f696e264-dc36-4dbe-a74a-d4b0c03d91f8.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 0xc8d1ca8ce2a3c16455b29550f5a156876212e6c2460d827770efff0e29efc013. 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/COA6W2101172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f685b1ded5a4261181f433026d230f0b1aa9853af34f21abae85202a25aaebb. 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/COA6W2101173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0247d0a72335d557f7fc51d49bf18d3ae797eac12b7b1b1fcac631b6a78bb8db. 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/COA6W2101179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe06c384f8fbbfb1b918478e4ffe49d64fd290e85e32bf60d71caccf1336e1a83. 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/COA6W2101183.
Siempre hay una margarita - Contrapunteo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540cf2af70db2749a531ad2f728d0cc3ded043648cabedb253265983f8f3fad5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/COA6W2101184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffaa0cd00a9d16c187a74d61bd78fc68469d0f55df11ee84d29b6b1e1f8a3d86. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/COA6W2001016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcefd454cae6029233560f6b72bc2c64c5d06a857ee3cc41bc7bc7be7c0bf50a8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/COA6W2001017.
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 0x68434fafb4cdcd1c20ce175c44b8fdb22246f4556b175370545b5203fcd436cd. 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/COA6W1801055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22226b7c405fc54d0e123df7086e40dcb5e7bfba32d7bb5d86cd8364d2cf79d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/COA6W1801056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41da365a134de335bdc89e13f4ac522d3945d4fe8d17b7720a4c18658ca48f01. 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/COA6W1801048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e80b1b3951f5e9236c4b420e33beb09670caea53abed76a2f6c49a0e692e4e3. 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/COA6W1801049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd677c7ce50262d86b0aef18f81eaa6f77b0c9b17528ed6f14cd041d0a61f7a1. 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/COA6W1801052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c773098223e885d3271fd35b313069a61ff6495394fae82a77a66865217e85. 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/COA6W1801054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c7edece0aa630cd9b9d4c4dfea8e97cac982efeb7008020f03b8e47da63bb91. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/COA6W1801050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba9fc6e953666fad4dad10b4943ad19c93f21b115d5064d02d8b9d47a5fd50d. 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/QMFMF1579973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eb816d59637834006a1d7e78dc5283cb4214649a98cef2b332e6a59f4d9ef8d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM4TW1508407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7e51bf391fd135c93d080c1ed534adc31674a5833c708e96f981a3ef7517c7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USZZR1012419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa941b020b0d9fb1be72e62df404cab57f614fca69445c15aa911517cb005196f. 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/USZZR1012421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f29faea8219970b93f2d8c92679ebf099d79f47b3b7bce96d6ce77ece3e393c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USZZR1012423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb785c0146947b980e0186f7525eb0e657e0aa9ab6f7aefe1852aabb0bbe7762. 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/USZZR1012426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06b23978941c3d973ae9f6dbce3813340dc906c8d9fb1ca825ba908a6e6d1ae. 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/USZZR1012427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c9ab72251f85ac41d42b93fd8b9ef46cf856e7e3351945273baa2b10641db3. 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/USZZR1012430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36feab6db505388a9150922b01d7421125156b50d1849feab8a192f975d3dae0. 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/USZZR1012431.