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 0x50436ba19bde818766b0460f328e968b226140d2512e02ccefa109690e6e9073. 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/190ebb20-f13c-44e6-929f-b523bfbd302d.json and https://artists.proofprofile.net/proofs/artist/190ebb20-f13c-44e6-929f-b523bfbd302d.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 0x6cad52b5c7686b811bcaa0446318a29727d522bf7b375e2bcfafe6ca929cd5aa. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:46:28Z), 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/TCADY1812857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0389287895dd9eae4aedaef2ca54d84070620f18d9d3be12d5f62d1405b960e3. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/TCADY1812861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf6d4e67520d0782770be556d223e14a2f6b45840bd2c5ed0d558858057c0975. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:53:52Z), 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/TCADY1812863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd4c61b18c10bc608adc163ae475646fb59e0bedf245355cae929eb925655e0. 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/TCADY1812867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf711ddc17a9cef997bc96da9d098725aff7ae4f757fa484e6dd5d997fef8d3c3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/TCADY1812869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0cd089d7b9c0367910321c91221f2f22605db1ecdb81a3a1ab3f96e8bc47a0. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/TCADY1812871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacdc03c151289b28172beb596ecc396a05c1ad01d9d82b4a9bde3f6379d0fa6. 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/QZFZ21935052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe26060892353571213c3ca1128db28fc4459c1ca90e43186faf521b162c9a7. 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/QZFZ41993029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923f9143a8c421883efd7c4e544084345aebbb30a29f9bf3201a32054401bd84. 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/QZHNB1977434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3435058bbc48a2e8271583d74a3a2f203d084cc57a6a0fd54a445caa3090d0. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZFYY2046285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6360f768fa98d459bff8f05a72935315d62df9a4be5a55a7c9d9eb9ff2026de0. 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/QZDA82244664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33c1b0769442a0a9a06182648d949a69e6337c1f69111b0f95bb4e5a9ef9683. 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/QZK6N2291926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b761c8b5fe96f4331ce03178e443935f80180c196cb2fbff1adf954be4e5487. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHNC2368432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bfe7dcf10dc28057552ce8ae4ee8664e7ed6150622430122a45d0bfee1f7ba. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHNC2368433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2529e7d1855fe00d0a5d0cd2b7f08fbc658400f7e1edb65b22cf9d5c93cafed6. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZHNC2368434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c4b928a893f2025e20c043f42c29c7edc1009db54f384e07759cc337387f32. 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/QZHNC2368435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c769a4c4aece1a532397eb046e58ad63a75d5fba5507928a763bcd3049edc69. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZHNC2368436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aeb8d33045e8a3f1fc1d20dec8c6edd7f1c61698fb3502609df63c68f4b2c98. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QZFZ62417461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8c97322d6ee91c2227e9f2e8cd0f81eba0f6c7c3d73d418090a7044ec56e148. 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/QZTV32479945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6a7321160a3944cb320199226dbf1b880d384315254cab8f021c9351b3ce1. 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/QZZ8A2451932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e892e87933454f000262e36513b41971840bbe6566f75107d23f4c82273f3e4. 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/QZWV32466736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86f73eaac7082a1a44d7adb5aefa00a8f8f0fd0b0c4df9662c074bd8cc46ae. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZZEB2423728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6a7321160a3944cb320199226dbf1b880d384315254cab8f021c9351b3ce1. 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/QZZ8A2451932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e892e87933454f000262e36513b41971840bbe6566f75107d23f4c82273f3e4. 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/QZWV32466736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x455144035054c56303de220a1996ef1eb339a950161991066fecd029e28d0bd3. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZ5FN2572257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c86f73eaac7082a1a44d7adb5aefa00a8f8f0fd0b0c4df9662c074bd8cc46ae. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZZEB2423728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e6a7321160a3944cb320199226dbf1b880d384315254cab8f021c9351b3ce1. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZ8A2451932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e892e87933454f000262e36513b41971840bbe6566f75107d23f4c82273f3e4. 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/QZWV32466736.