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 0x540c6fe3543c4082c84e7ef21f23833b036e84422fb55c70837f76b4f47c9c2b. Chain 2 (Bitcoin): anchored in block 953687 (2026-06-14T20:19:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/69ccdaba-c883-4758-b25e-c656bf960d85.json and https://artists.proofprofile.net/proofs/artist/69ccdaba-c883-4758-b25e-c656bf960d85.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 0xf2e4bac435d34211a0361d9009488bb981ab91cb2114ec66e61539759a178f8a. 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/USCGH1186751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4c0b02c364e90ed95759597cc1a3c2245ed42d167567d57c33e0f22c702b84. 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/USCGH1186752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ddb3f96b7528d9210149786448fb39b7dcfb847bf13609f59fc7b6cbbecfdcd. 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/USCGH1186753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b480ddfa5e37fae91c01d9549d403cf99d0c03fe1ad0f7dfd78b05197404b21. 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/USCGH1186754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f7c249b1c4eec59787bc137642458a7dec99e47e399401d3811860e820ad57. 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/USCGH1186755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd771fbbd9191724a611a2280aa8c759d1694ec0929213e58c1d9a571beb26c5. 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/USCGH1186756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfce3f61614871959be64db1eea28309099bd0a1522fe64c1f09a26e52e7806. 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/USCGH1186757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06dcc31f884967705336ca409e1836dfb35cca6ceb3b1060081b015c5d61bed. 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/USCGH1186758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1fc0f94eb077db41212f40fb24ca5ca32cac57039f7e79d47c69dac5012650. 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/USCGH1186759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79a4935cac855c5e3b5e33425c4ca94bb380eaefd209e46e2337aa2be204e52d. 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/USCGH1186760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab9b2b385ade8793926c9d8382eaa23b5c7efb6a41b151b72988e924f9861bb. 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/USCGH1186761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5c6df66994d9c81485e569a35e496760620baa38add5a98d480a3e58364c77. 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/USCGH1186762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17de56f4943454dd23b8ee8ff4089f64da841ed232d04f97575639b35886a4c3. 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/USCGH1186763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2467490b83eed70b8d7bf3343f052437d97272738e1767d738e3faf59ef0ff44. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/USCGH1186764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9af1baaf8ac216b9e8f0a195d9b227b1e143a53ee6c5f6ebd4fd66c0e3a01237. 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/USCGH1186765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3ab97baef1cab2e99363e478b113756f127fd06a9aa145acc23c42c6b3df97. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USCGH1186766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e31e7ee0ab4e6048314a7dcd9a3d88e1d04138da07e48d304151344c051d236. 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/USCGH1186767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd765343e7be354b0b055abc048611cb75e00d4aeee901a18b7a5dc37f23b53. 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/TCAGJ2218896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc172bab95891e9417ba11456d98ffbb9d90ac9578a0a485ae9a938e739267e. 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/TCAGJ2218897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbcf99c8442409483a3ac3e56cdc2fb551f069086169e91677a6b7a8d7112214. 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/TCAGJ2218903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9fde2ee0f4de601c042ac9c45eaa52143f821693cc5c9a3eb504f9506cbe1f. 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/TCAGJ2218905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baed4c6729d5c153bba755c0dc8cc329295d77759f00239c25cda0ee695d635. 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/TCAGJ2218907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f091fc19ae0304bf8d2149934d5977e9d19f2f034fab1c32d264eff9bd7fce. 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/TCAGJ2218909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x905a4c89d37b7bbac3e3d11cbe47df07bf3f3c398e7423b514e7aef7c9f113ca. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/TCAGJ2218992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8541dfbfd6ef22e0e69845687b433051911b0f6184f8cc7756ee686b2564aec. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/TCAGJ2218994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4079a0e32e12d072ab18aab151f3244c12ce4f0340dbe4780bdccfd6e238958. 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/TCAGJ2218996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56590e0719ed8919ebefccd0282f954d6efa732816b1095811632c3b6fe71c14. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/TCAGJ2218997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c5ee37c0c2376f2b588ea7551876ee91af6a8fb81f8afee04fa6d2350e0e36. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/TCAGJ2219000.