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 0x89dd909350fc1112a05429c131600838a4c572929efce27d2d2728d1ac37a05a. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/460a56ad-7fb9-4687-bde1-f380501fddc7.json and https://artists.proofprofile.net/proofs/artist/460a56ad-7fb9-4687-bde1-f380501fddc7.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 0x4bad5167d3cab5a988eea0a56c65c332097eb4b51224de3ace43e38d406b1052. 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/TCAHC2371653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09ba0a032df042d3a15f22c5b2797fe45077bd399df1f8a2cfb89a02e1d94b77. 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/ITG372300046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0944381b2a2e34da649724abff494e784fb373c718881d0aec9424a1f86a7e39. 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/TCAHK2320309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11405f4af4760fcd4fe5fa5729ee42ae2b9e3935182fbdc825bfc368de259fe2. 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/ITG372300048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27540bddf765f5306d2104eb05391767851a21bd35ff8b36afa642e641a1c35. 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/ITG372300049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab654130b47e1399b992fbacdb30a736b02dd647e2c591e4c4c816537db9322f. 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/ITG372300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9c6a147bcaced1375c117f8f4407e8c1ce93aa25c8f3d098f49b68f6645335. 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/ITG372300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600a8c30c35ab05f2bbf2c43ede0b1b39e502f79754b2f63ca9957b86df63a3d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/ITG372300043.
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 0x0d76d50f284d23bb5a9ddb4f3e665475bb46fa2b999077715b3731f5723b37bb. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:04:37Z), 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/ITG372300045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f88dafc3eba53c4681939ffa165a50886d32ea713d46826676f20e42a051f5d. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/ITG372300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b270102f10556e9226beb25d109a01bb0be97b803b8c54a4ab43bc3abb302c. 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/TCAHI2328241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a8d46d9726fd9a17c9b14fd1377574fcf1e53f04a54f2dba687ec5a408248bc. 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/TCAHI2328310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec224559686e83b4e280bcebfabf71818d5eee447322d7217c6563b64517e062. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/TCAHI2328495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7b1c643807b90b82041ebf822bf21280a7af64b3af989e3eccace3661da39c. 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/ITL941900057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa508165458df8d1e83193509002b3941caf17e32d67642fd9126d8f28c8b31aa. 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/ITL941900060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f17f6bbcab857761b415b3a0137350a158e2bcf5091dd41c6ca401022d6e92. 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/ITL941900061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc3a166dfb041705184aa993171822e17c8c6a854b8edee2ecfa684bc43889a. 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/ITL941900062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc3e55f4730f83aef6b8cb6cf62cf0b446fe454969af291190b7a6b27eb26eb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/ITL941900063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f2de842147c9d96173c6821365dc13aee5968d770e82a25cb03a2f21f6e3fd. 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/ITL941900064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47ff6a1bed4938fe4fb75747e1e680296bb13b69cb161fac4d37e681b6c8dd5. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ITL941900058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e2282da6a70d1ba8f9c8b98727efeb2dc0de7a2c93f352479c4a0d607d174. 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/ITL941900059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2668e6cfd2ec5ed79afc879bdd803838f4128d31460e5f0f340ddd8cc01cb381. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITL941900065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddcde707257a612272c403507e4acc9f6e4939dbb8e394033f92b5d95f2676ff. 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/ITL942200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b80a55bef06f1acd348f1a36e3b4d57102321326103aacd6f2b6ef4d6b9d63f. 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/ITL942100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6e71af63d6221febbdf46db4ababd13b1bcea730eb1315a3ba570ea5325c00. 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/ITL942100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35dfc59f0c7d9e54bfa6ff523afbf4c114ccd015bb7c52ad7de2da5762d41775. 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/ITL942100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ce733f36d2bf966b332ce42b12e488117aaf7c715b4fb1c59d5c8018faebf7. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/ITL942100009.