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 0xdf1e6fe3aaa006903f7a0007a6efd8d8dd1f3b85c4bf028f1fb1c650da8c74e3. 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/f2b97206-8ea3-4175-b1f4-1df6721ced6c.json and https://artists.proofprofile.net/proofs/artist/f2b97206-8ea3-4175-b1f4-1df6721ced6c.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 0xf41526967b06b1f99d286a2fbaac680f95730b37088d1c44f6f70deb254c0873. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GX89G2445462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aed6ba45748cc2305b7525a597e82bea45dd58a2a491201fbd34ba6f4b31164. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/GX8KD2441399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d0cc8bff5e889ff01d84919bd9ed042d2d9eee9914273309e7c4dc26206edc. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8LD2463666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0eddc25b6f6c36e2ea9dc0a666bb714dcdbc681cbffe21d90612f506c2b4400. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX8LD2491500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x658f8e2de5e9ea4250ccb247d764f8f64a70f5718d1c61874b997d286f39e325. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX8LE2454436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c4ce57693fc4e0082849233ca81f50c2f434bbd9f18075b1d64b32cd6c03d40. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX38U2420972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d26392b8185d21b266afd17c51ce2cf7281c3638d8f91aec097eea8809187. 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/GX3HH2492696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa11b20e93bde34e9756f28729cd84ec04ea59cf413fc3a827f4e6e8c036f61. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GX5MX2460154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x049c70be29dfd07f3c09bf7085a2eed50dd2e35f6891d17e7a07cdb0b8fb64b7. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GXBDS2439948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf72033966fb4025ea81faa6b798c2cc36f281e76ef4e4507756fad912d2fb39f. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/GX5MY2466706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5dd86141128f551578158bd1e8263b5cf1e55cc7a436edd9194071f2a9673d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX5MY2491000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bbdb55e2d412a189252cd049a3ec7f15c46e95f52c6e5a11291e2b5712cb7ac. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GXESV2469131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7085855cf552c7b92958075aeafd38be1b12abe211438d1582c3bf32b86ced37. 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/GXESV2409647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb87ec12103d508479730006085fd9bab356826bd61c60cbe4b9abac895fba5b. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GXESV2484824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b72d0c9f4820f20c64c46c0a157dd256e5940144f65715f4a8e010c84152e29. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GXESV2474974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620e2541e09baec1a1395304fd7aae5b1897bd2e7cc78393d2b07d7635724cfb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX8LD2593200.