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 0x159f53037d1ac01b86a3359591e8bad2e47b41ab064c8bf3a45809ae86b8129c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/334adb6d-88d8-4bbb-8040-a9489ac2e34a.json and https://artists.proofprofile.net/proofs/artist/334adb6d-88d8-4bbb-8040-a9489ac2e34a.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 0x1af3205bd94d3bae821d1fda06a1e94701111e2a2a370bf2789f7d5bfeca0e3f. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZXLZ2332242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52846bb71108fd15ffd994b7fbbc5a504b01f623d7686a25b3d4750a1ef63f72. 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/QZXLZ2332250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dfcb21628f7a2d740f03240a4aac6f5d8fbbbf4f4f011c255d0413104f9eeca. 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/TCAGM2218137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f73b6ab27cb8bd2c2cc839f7c87f3942c6d47a9d553f9bdd2ebb6173a0a3b6. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAGM2218169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0405d2221f3c23733bd85a2bbecd67abe5848a122efcedae9f260331274af1. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAGM2218175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac917cb6302cf9a63be1d4c8c34789a1ad41b40f7c33a92c6f82001db53a5a5e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAGM2243727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d30a99bf1ef0ba3a9082d62f2a7d8be1887e6b3f88077f15bce729cffc48e1b. 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/TCAGM2243732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5376671e1d8f6eebfaf2154d0d79f2d6ab7aefd863e03edb66c1651ac39d7e. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/TCAGM2243764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1081391fb064fc27b9529219b4864a81ed09bc75d1fc3040acca1bdbb8e954. 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/TCAGM2243772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60345b7c40e3077d213b87e6fc6ddbd23e00eed5d6c3312ba769d548b00e1d6. 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/TCAGM2243783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3caa6e2ad31a3ce3df0a6bf7c96fb4f72fc597f97eab90723becd6a508f7016. 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/MXF160000205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c68a268b491933f480c77ab795125ad0d0dba194355c9a1023ce72ac171a4b. 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/MXF160000210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6059b08220b9b68686a69799ac37011f5bf444392e393db9d1f2348ec5882. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/MXF160000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d387632c1f9cd7524b4eab8c836eddf931357405dfa711d77b2a7648f18d00b. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/MXF160000215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e41ca3db885877420c044d6aa8e482650181e7cddc88adf852140c87aebaf25. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXF160000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8a577137cc520456f7c881dc8f80b67b851f56c7223e18930d86ebca07f4b1. 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/USAGX0500181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7501aacfc83e677a59ed41c35a31d68bd73909ae489708f8cfe3f794b84b2fb. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USAGX0500183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d61b1bc1c4e7b1803a7353187179b7876eb1936225d4e4860e9bc0cef4b592. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/USAGX0500185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d074f6554e51965eb4bdfaa9d92ea68dbcf7820dc564bbf07df8a791a7fa40. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:53:12Z), 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/USAGX0500191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08becff7efdeef47d625fd09c37634024dd7ed2f3acde9d691161decd2a66b9c. 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/QM6DC1722602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf287c3593d1842b34ada9888bc0b86fc240ae0df52758fa9d7f1f34815e0edc8. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T18:49:03Z), 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/MX4971531606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf702884fd010bd3d63756e793d0150ad5aa9c42478101e3316fc831102fe6be. 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/MX4971531607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ece2a931680e634afbe663fbe344c31fc652fa4688f853c961add9e5662f0d. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/MX4971531608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b945782a43614224ee351863a898575862e00b41b4065a6f14d1ee16590ebd9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/MX4971531614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d2455dd85852c84294c180d659a2bb35d6541b7149440d958b53d799464fb7. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/USCGH1885241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59867a793090229ebcb0ba0a2636c172af576fb4384f8520eb748edf30a7785. 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/USANG1913744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa13f579a4ba7ba770e1179512de253521f16fcc8c14b78d73d6caada24e729f3. 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/TCAHX2466321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b18c54655bfc99be684a3d31766d25804890145a62cbf5af1e37ef4ab0a4b9. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCAHX2466322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58365c6807232689b5e79fe4b97d76b0a8c2b8ef7e88af12752c651de1a00f2. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/TCAHX2466332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4627d2987db3481e75b0657f306ee615e187fe4e1331249406b168a7288fe76. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QMFME2189715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e751437af2f49328e1791ce88e6267d3c1c01cc7fd7b00cad9d65b882c5b79. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/QMFME2189724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c271dd0f7e2081218093b571f68ee0de593a0a683a1ab8166f4ebe6d37953. 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/DGA0L2421579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602eeaa074dd9857738c48f48bb105079e3dfe0c1b8d66a8591911c31ae54c7f. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DGA0P2422834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x628c2b308ef2254bfe0c3bfd1dd519c27ac393f24fb07febb1f3cbbf1d3ec73d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FRX762517147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e30cd09ade203ce80e715ac69c7b1b2a758ab90e8c0eed06b2d3696ba5f1f82. 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/QZNFJ2506612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0eeb141ce699e6343b0646fbdf0807062b34e110569733120e27188a42e0fec3. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USCGH2453584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dca0454abf23202ef1dc020b3965da35d37d749b97fc56f763cc5d84e92372c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/MXF169600111.
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 0xd92b65c665e4476e08e3120d42d7045aab815faf1454d6c98cf82bb17f67e399. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/MXF169900358.