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 0xacab11fcc32d14620df578580895de2b5b0f2e189f7e22bcec107d5fd35898ab. 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/fbe5e74c-7a60-4c71-9fff-08b006cd3853.json and https://artists.proofprofile.net/proofs/artist/fbe5e74c-7a60-4c71-9fff-08b006cd3853.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 0xa575ac067a3be6c6576f100967f861661007e8824f835a4db92ddb1125606f75. 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/USA2P2041794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x186cf2a1974072c44b0527e04bb82c5a07ac9308ed1df7f9397aa746f38900d7. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USA2P2101671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fa77abbde6c71979b85abcf1865baf50a224b73cb3cc99f63a2d3704f40fe1. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GB2LD2210055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe669554a847c12889ec8d919eba5df5d003e712aef1326011420165a5a8563da. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2324996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31ae931edc0e653de0fb460b4c8bdfee8ade8633b6b6a8d3876e6f4efe6af70. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USA2P2357216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908f30a047be7010f6a35bb1590aea99712e9e0c44df7367ca926ae566f0317b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USA2P2425073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b5f315a2b0360f14d0002adc0035f949eac375f05ce460f9777def4a59eb143. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/KRMIM2452145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8865e8d9b1202a651a1207990d25a3eb2b0e6a90e407f65ff3c214655fa66a5. 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/QM24S2105898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937ce5a6e14bdb15d349e6178d79212f48f5fcf9691ab70a8e6150c3faa0efaf. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/NOUM72100147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc15fa24cb4d018779f923b3b20efe048d3f7a9ecee877c358eb568f12ba1e86. 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/NL2VN2000062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6910b8f124075e404e351e47405c67f247d7d80355e49b0d44885243c2ebda0b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CAR072322068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61697fecfaa5d6ed4e18fa06da58b01dc4de6eecd8c704b7670fdb18a57df08b. 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/CAR072322069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x830cdaed3303944019dd1b64950d7c0b5b91fc29cc69b7a7ee7ade4f065fb24a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CAR072322070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1275ee5c19451aeabd63b0fae8b91485167b509b45d1cbb9271a15e81ffbe174. 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/CAR072322072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ead06f1a3b0ad3466f75f607d117c12b16e7439ecd5afa22fced03e0c1d270. 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/USA2P2231304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29495a7f8edff966be0eb1f298da184a9ff41c24ce10444167f08744773d6662. 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/QZ5FN2389092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x111a069792232984b3b1f6161ed34a15e9cbfd57776015dfd9456805350ba351. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GB2LD2110029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e389f41f335d2babc1dd338032dd4d982db5ea6aa07d723b5e033b445c0d40. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/GBSMU8487652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fc623d790ea783c3024bd3cadc24bf9b3c6bbc11bc4102ca7a5a4c2b354d55. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/USA2P2205792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4063debd5dacb54baf29789c8e98327c6a25e4609d32bcaa38aa3af10e97e6. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/UKZGC2402962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6408640a157874f0271c6d023cf707718bf5580983cc4a6b2a62d700be1a2746. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USA2P2255765.