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 0x91b5d052f292534dd95ab6fba82dd0ae253c13efc19974ced3885d7e040ee6fe. 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/6df4085d-253a-49d4-ab50-d208ea53ecbb.json and https://artists.proofprofile.net/proofs/artist/6df4085d-253a-49d4-ab50-d208ea53ecbb.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
T̨͈͗̌ͥḣ̖̻͛̓ỉ͔͖̜͌s̠҉͍͊ͅ M͉̅ͮ͒ͤỉ͔͖̜͌r̴̨̦͕̝r̴̨̦͕̝o̯̱̊͊͢r̴̨̦͕̝ & V̘̪͆̂̅o̯̱̊͊͢ỉ͔͖̜͌ḑ̴̞͛̒ B̩͎͍̾ͅẹ̿͋̒̕t̲̂̓ͩ̑w̦̺̐̐͟ẹ̿͋̒̕ẹ̿͋̒̕ṇ̤͛̒̍ ư̡͕̭̇s̠҉͍͊ͅ ỉ͔͖̜͌s̠҉͍͊ͅ S̵̙͕̀̃ḣ̖̻͛̓r̴̨̦͕̝o̯̱̊͊͢ư̡͕̭̇ḑ̴̞͛̒ỉ͔͖̜͌ṇ̤͛̒̍ĝ
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 0x3870d3b31bfd13d3550a9a50961caebba10ed290fd3ccf67c756afc4b1b26eb1. 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/QZFZ22362165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa373578be8d89bc24495fd6c0a6f8f13e3086b1c691982c1659c5cc539e24f. 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/QZNWT2268266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173c4fc6ea08f6cfe77cb15fe8febf29c27523f527489fe715afbed654dde36. 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/QZDA72461694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x679c753ada6dde6175418c3c2d2b0f01357752cf9ead0760a8822bf14eae783a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QZRP52259010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891e521239476eda5185b394b8acf21ba1859bd12a632dddda82c5ea6cafc8e. 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/QZNWV2337709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31d76cb16239aaaf15b520a9a2fdd773737b220a0bd4427437cf52811be3d6. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/QZTBC2347602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ac9bbceccafc408d82cb35cd81d1aa7561d9e2718629989024ac83f19d3d2f. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZK6H2066366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdba894f575c01185d8d685d04ff71518bb71b70ee7ac207cb16ddb8815ff4f56. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZK6H2389662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883fe7413f224892953c5dcad6e0b5c1e20f6e94453be314bedbef16a4643fce. 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/QZK6K2019433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb1aa6dbf06a4835e22efef98a0463ebd3b94b0367633f0ffee23acc72b851a. 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/QZHNA2059016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d84a7bf0491532f49ff75051a8ca151814257c98ef7d454be995e2d8c5f563. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZWFU2450881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7173c4fc6ea08f6cfe77cb15fe8febf29c27523f527489fe715afbed654dde36. 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/QZDA72461694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3da7cc821da62162a29327f6a179dde458ef3eacef3b75b868cf563a1af98c7. 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/QZFYZ2484018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e31d76cb16239aaaf15b520a9a2fdd773737b220a0bd4427437cf52811be3d6. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZTBC2347602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4891e521239476eda5185b394b8acf21ba1859bd12a632dddda82c5ea6cafc8e. 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/QZNWV2337709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3870d3b31bfd13d3550a9a50961caebba10ed290fd3ccf67c756afc4b1b26eb1. 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/QZFZ22362165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff69f1663534c014d2181302a01cfcbc972b5e3c279337ed9a077ea5be24bf11. 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/QZRP42131644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a47e8f8a32388da0f69d356f7e57021a4852622364a33a9c9847362681b75d. 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/QZRP42131645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12eb80248d9a3d2a712a235f9a2555ec1c0fd4b41be97518a88e433f23b3e792. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZRP42131646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d58e254733af98eda1dcefdcc128719412a50ac068432121be464ce2c1af6b1. 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/QZK6H2148722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0fa1b1e29242e4ede7f31c68368dba439dd56aed5acf34c6cdf8657028acc7. 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/QZMEP2054025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x245ae63f743dc2f1479179debc5e150c13d84f79507f21aa48590e1ca45fa051. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMEP2054026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7fa7e5070887338fc69603cb4bd9b0184ab59a8183c8a3cdf1a2025b5d78b8. 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/QZMEP2052817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aa4c5dbdf343a5b7e49fa3cfa3c7aa0776e07e42eaa1eb1eaed77f830a23af1. 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/QZMEP2054027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe846c640c8871c858426cca18563c87fd9280955f57d33025ab787e906f07e3. 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/QZMEP2054028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ed21914100799999bd822fae31208dee4620a9ea6cab65a0b0b5f8b3bc9235f. 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/QZK6K2012637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b4fb5ca2ae7af15281a09343a6e9de958481ccd7af576cbd7a294412dbc84a. 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/QZHN42397432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb447277e015f517d266f475797dc8a73c1aaf242f171b35947b0504acea3e19f. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZK6M2412364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d032c0226905c6a04b33420872f26d53ffcb5f64c80b4a16cc5d748fa0f1ec0. 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/QZNWS2318712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f2d126b9e9b0af0f457d28acb2a03d0c31a45f660c8f72908651b1d4de318f3. 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/QZMEQ2244210.