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 0xe1fbcabfe06b05f77640ec912944221de574f84925f25c41a8155cf04196dc1c. 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/849b0887-c43e-40d6-97bd-013fe9896b41.json and https://artists.proofprofile.net/proofs/artist/849b0887-c43e-40d6-97bd-013fe9896b41.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 0xf9103262211a88241e1cbd5d90a1ae3678778409d3a3e1fea59754fa4b61ce83. 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/GX38U2397822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c1b3f411b657d205dcc568890f17799393e7e78ed8476bb50ccb35f93529d8. 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/GX38U2361792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3494771a47f8388808384c0f5e77cecbe41ad22915cb02182a13b345bb7b1226. 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/GX38U2347733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf5d3195a8b20a9ece657529b92bc1cc3d0d4126a0f621bc190da53fbcdcf64. 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/GX5MY2220533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05564c5571202a53e551869b6a42f6fe022efd30ff8b672296147ca61a593e81. 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/GX5MY2220523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2df97fd44b2095ea879591a0f4a8f5127df747e8765d3b77e7b2aefb36477085. 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/GBSMU4655356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f82c06fc234489a6c34724f50bea3181aa70aa2ec8998079400ca49ee5cc505. 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/GBSMU4655358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcfff37bd567fa9cc16b9bd28a89dc8c6434554d3d7ba683093b27afb8b66c3b. 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/GBSMU3778733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f224b9f54b1bf42593bd2ee5cb622cfe5fd0f3ccd5f1fc19fa8b3e6c53f099f. 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/GBSMU3778734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5d356725d2d3e3db8276d8f748388fce2ace3cea5499dbfd7a35f4d09c5879. 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/GBSMU3778737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2af653fdff13f7e984a697a141c1f5a767895694e32da3e291277f1ced1b4c. 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/GBSMU3778738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cb49c50e69de301a08d98c64f5d653afce647117c4c4bfbcad9ff6f2f6cdbc. 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/GBSMU3778739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33ebdde8ac0c8a87e43741cab34e486ca2ea55e5a722082f0272b1307c4e20f. 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/GBSMU3778740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850e97ad08baa1a03f5b1af5f89035d7772fd3d9508e6699868d4d74ed6caf82. 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/GBSMU3778741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8840360949d550dcf6658043330fc299c99e398498adc3d6c383b3b94ac2e60. 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/GX8KD2374932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2c0174ad80bf52734e471ef56d4bf4e7f4f4d068a4599f4ea8222c608d2e5a8. 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/GX5MX2288704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x042e69fe430bf75c2c45bf0bbd054c91656f1fbb011e6e096d9f773af2392a94. 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/GX5MX2288711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa385bc2d79c22d79223015a81920e429732a21bbe1f3705c138d2762d218490a. 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/GX5MY2113954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02dcae409e56b3bb111671d8caf4d2e734c2dbd4e517dbabcd6e3e031ce3b70. 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/GX4R52101058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6012df62c37ab54b6a32c87a9f6f5986a47ad7f35a7b008e7fdf508c1da412c. 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/GX38U2174243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ad6ecf2b442bae2badce72e9aa2872831a9815c59b036a3b52d15f050e7015. 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/GBSMU7585220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a4c874f97855b3a1987549cd9976cf8292d0d7dde3aa2b2491988d56eeb4e51. 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/GBSMU7189642.