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 0xe46ed7c7988bc58fcdaf9c10ba60c26ee5ff3059057de879865714544178737c. 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/c2170a1c-d978-488c-accf-d5a2ae5ee595.json and https://artists.proofprofile.net/proofs/artist/c2170a1c-d978-488c-accf-d5a2ae5ee595.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 0xf40a1707d2e56ae79c0ed5444d9faa926629884a8e698873d26bb3ba606c1a36. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZK6N2076030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ff40732a5a42aa8fc024f39fa590d2c8980b656526f4c7fd228eec130976b0. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZFZ62175743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254cf04674dc628729a732bb5f2cac585ef27c16d932e141e6b40a69ccebf20d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNWV2234715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30f2fa5d507c81d05c87aac1a3990d29161c32f3fd2929de678c2268674e5368. 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/QZFYZ2371111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded2a2d1894e48d51c63f3533d6bfa92bce5491d152f62e52607f281881054fd. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHN32365447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfe82cc6db4536497e96682118e321aaf8e2bcfcadb0711b71a3c14346d696. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:33:31Z), 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/QZNWQ2394861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf1a32ca1129db73dca2c61d3668ac2e67d511b29a49e318928615658bb3001. 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/SE6SA2356162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a18f933bb3d2d7aeee90be2bd9d2a6174723ec6fe2680524a572e581d6c016. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/SE6QE2378203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fa55de60b62dd2b1cd3bb0d62e111ce76fce6ffff120a77aed6a6be9c5e3e5. 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/SE6SA2384885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568e6cee8e48820c4e0e9807c5e0bf5a1b080e6c064b03d89d5dda9bdd969170. 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/SE66N2303190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5bbd7de0f0697de871ed7451873fb871e39a7e1d48ca52096a218ef32135cc. 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/SE6HN2492531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a6b2973c7e6119f638ed4432463691c0d461605aaa00ad4d01569424c4f7b4. 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/SE6QE2430354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9d5beb30210b89269f02b9565bf73cea4e7621bf589183fd6c21a5aa02b405. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/SE5752421115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9a34ff942998800ec03bd620c1314d2fff568c1e920b17cb744dcf16480d08. 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/SE6XX2503703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01d490413ae4955f29c5d999a1013196346bd48aa2aa076025a4aa5ba7ee1d41. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SE6XX2548110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9e749b244ed643e1334b1260eb9d67aef5e2c74acab39a7f837ab9be026c1b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/SE6XY2545544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abc7e6f37b65f41b4feb456defbdf9e1578e1bee5d6efb21486053423ff9f72. 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/SE6XX2548114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9a34ff942998800ec03bd620c1314d2fff568c1e920b17cb744dcf16480d08. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/SE6XX2503703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc07155963ec2a211a48b63feb8fdbae855c79f29acf00538bc39397a2a29095. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/SE6XX2548115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd799bbcb98a79ac1d5ce42e400955053f05aff790de1076aa33fc50a22b58fb. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:44:14Z), 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/SE5752432830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x872689e3bf0c3660dba44d26a3f425a0571a44ae4ca56e049d2de3327e5aa289. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/SE6XX2548116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb25bec4b047aa4b3705c536e529ac6f4877c397c0d0276c96103e41ba4bc321. 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/SE6SA2413431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c9e3b08c4b5b69fa0fd4759b3baee8d83cb0e45c4beedea74aa31edfd55276. 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/DKJ8E2400201.