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 0x2ed559406dc6d0ab40735d6887419a09e0f4252ac109b81a02afd93ad7aecb04. 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/f006bf72-d538-44d3-b45c-82d21d74df79.json and https://artists.proofprofile.net/proofs/artist/f006bf72-d538-44d3-b45c-82d21d74df79.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 0xd02980349e1ec9b458149e03d60d08e4b5f0a3e8e4b7f93dc956ad060c0b360a. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/FR2X41935446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x978356c59d96c78bf727a924cdf69fec06789a5149893c30f5e4949821e55996. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/FR2X41935448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c33e9489411ac1a26daec228218ad0e49e90f9f54843cf74ba4cc88532201da. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FR2X41935449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773b129bc9a4123b6fd841ddd527c11744adabda601d6ee6ed1a099f4c00ae40. 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/FR2X41935450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f93af9e35f82208415db2cedda08ab3dd885cead3cac00d45fb9f7d00d1d565. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/AUUF10600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbbca73e039feee5e7c08abb0e394ea15f51c24179bc57eade282e65f08aa93. 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/AUUF10600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ef3c8b30116023693bd9a066e7e0c5ad95e67608386b8180653f91932a48455. 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/AUUF10600036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03acb333e82b178a8ce6fa779065a5ce9b636192994628b72496a2b513f48de. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/AUUF10600038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5b3d78bf89cc6a778b9eaea1abb734f91dc3966c93dec30cc8857a7dbac840. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/AUUF10600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2511a321e7ace8c69abde1259ca38235d2fac219fd094c1abe72266ae9b8ef. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/AUUF10600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336674bc0d331156d279d64d23c0aafa8d3a2f4393262039e3152e0413b244d0. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/USHTV0810097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b5259088e36ae1a962392265984fa41a63c4a3428bd3927646764d51dfd4eaf. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/USHTV0810099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98289b458fa6ff455a6e06a37456cc98bae835dd135ff5673d1812846f51f74e. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USHTV0810100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32d69da0cbcc8f1987811740a1f8b25f68cecb30a0882397625cc224bff78fe6. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USHTV0810101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9883c69bdf8d0b69034ea99ffbc9afa67cb6507ce5a05cd52e07a187ad101056. 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/USHTV0810102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019582d409d2a3e791e9eb56eb74a88019f2d6e3aade55582b356f8f3e2ec9f5. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/USHTV0810103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e90bdf31750fc767905304fa2097137a72b0e6788d47f850d5294b9994e4438. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/USHTV0810104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b949ba5447c76b1b3bc3fb0c0f2f680d09574f9dea129a54591b7ac2e2925. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/USHTV0810105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2394ab67bfa3f07c3dfcf4c827ec515e01ce9580e58f31556b9af58a59ff361c. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/USHTV0810106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb96422649c1ade7e633e1c1c884790414cb9813bf5ed881787f53217b5aa6cbb. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/USHTV1010193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846458f2aeeb20fd04e8d619dbc8a82496a07f999ee197b8cb878ee24645e1a8. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/USHTV1010194.