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 0x64fcd4370bb1fb6eb3e7d9fb686701a5586b0a11f036f0311dc1a788afa19caa. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8b1f9cce-4f5a-46f6-8505-7158a9bbd763.json and https://artists.proofprofile.net/proofs/artist/8b1f9cce-4f5a-46f6-8505-7158a9bbd763.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 0xa926e81b160a8f13e5cebb4fd7cd7e50b5e6dd2a767991eed1fdd1ea3275496b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6P41823079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d0b83e4596f52139895ff1648edf16bab138ddea61ec539f1df25995da1958. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0464040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c0f1ce04e8bcafba3dc197ec78a1334169099d366e28300282771578f55adb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0464070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71136e2fa17f080a0ca508417a47c9ef8210b2e588cdb237e3fe2d3f50bd6f1d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0464090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x470c5027dcd8c8abdb740945b76d83ed9854c0912233e704c8ed814fa49bfa97. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0464110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af2150bde2c82c453712cf1e631ea84f7addf660a20ec49fe55a48b1c582a49. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0466050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699c6b770480d4b4d554dce112b803020c3ef0e7dbb097115e4b8b5a2f498d66. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0466060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd877abbc95a1227b27232d752d273186bfe815660d9d4e29d23c448c936b39d. 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/NOHMA0466070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6fbb8aa20822670ed15aee49dfeeebc9fffdf58ab6c0542701f8641da505dee. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0466090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd7e916f0386835e0dda8d3fa031b3acb4af20f2c746e6d639cecfdf59c18feb. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NOHMA0466120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb075bb49246aa3c8b66025026a7461580d4e44fef932226805a7b4fea6963b96. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOHMA0466140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02974ec562478a8db4113c5c38432f1931169af3db6ab295bbb14cf489333d8. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NOHMA0466180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ece68f33977dffc5950a24aee03c8892e5e131e98a838368ebbad019350af4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0466240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6479a7287e17221f63552a294f4b6856c7daef60eb83c09082297ae7774f94. 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/NOHMA0465020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65fb9ee944b565e22ea59f9999d0ccea5a6d44078333ae85708e5a371414caf2. 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/NOHMA0465060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c3f726646ca2af0fb37c747184b6bbe30f355514cf6518921db372b9322589. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0465080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf694dea7cb11f388e6cd195d68d431798b22ae864f47b55cd61600333c0c1b06. 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/NOHMA0465090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09c127086bece00188773afde0513ad02aaf34f038d7a1ee28f803657c8e30a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0465120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10343e8108c40c1a0ce08b5904e56103ebf8b8137db2fbb285fb31f682d40cc8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOHMA0465130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af35e7d90b2ec96ae89f4c24b32c01a5763b9425128be46fde8ce215f84c33. 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/NOHMA0465150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530798520dc08f996ce2db97e6a4348f556507eda38a5fc029f5995c2a03603c. 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/NOHMA0465160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc278e229f2f3eb47c2901f64bdcf9373d18543fc44609c34678649cd76bf29. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0465190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c6b0ef35670f83edea38445f2fcc1e44f0a1248cb5cf3bac794a00f987492b. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/NOHMA0465210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77dd7285f8013d3e0d5aee91ba8f2bd2cee102556d5ad28b680dd7c82389a189. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NOHMA0465220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb550e9e3a4f110910ead1b4d6d0b220a121647a96ed451f42c2842ebae5a20d9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOHMA0465230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8207022ed943495d7f573d99b24ecafc276a530f33fd04256503f5ff69661db8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0467070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb687ba85a24b02169688db54ac8ac16abfddf02dec12918b27c1ee4f20b0041. 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/NOHMA0467090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x453378589684b46c2dfb611911b0716a7a95d2c4fcc54693104cf9749e1c9375. 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/NOFCT9632030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17b279881c36dd34186fed1dbc1a2de11caec1769d8ba68bb3f17dd5fd203ac2. 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/NOFCT9632220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c18f74f8cf1b3a8413580fb7237f2742217bc3cdaea0e1e5f7865db490dc2d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOHMA0693060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8708c1690b0cf57e3968c5001ab20faf517344a639989e39188adffcd679a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NOHMA0693100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76746b8a91a19b693ac4d2af32a1b533695ef37ff7046ed125843d5f4b822568. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/NOHMA1367150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d24b23e2071c9f89b208355ed8bd05e5989e480130af655a66fb25bab82f64. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/NOHMA1468010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8db8e5d7319abc2732c26626cf47689f816fa22bd67318844a76ba891cb3fe9. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/NOHMA1468020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f48cbec38216e2e7c16d927ffb3e46fb504d794e93d682dae98a8b55164384. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/NOHMA1468030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc583ff173010adb2ec5d89c37ee69c9dd43232db661098bbda82c488753a848. 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/NOHMA1468040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9647d17c35124f697721ef626a434577889458a1d49444f94d33995a497f4a9. 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/NOHMA1468050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a3244d80ea4141e47136f634058351c1dfe6c6c8f8d395afd6f1424cd2b22c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/NOHMA1468070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeb6fc486bfcb06b7187c59fa795a9c3f4e2cf46a01cc15ee4cef5d53a2e329. 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/NOHMA1468080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91899141553a59a981ae9c83ca5d5a2c190a0980b5a1d316c4999c61d8f8ded2. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:33:22Z), 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/NOHMA1468100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa832dafdb6d76dc321a65cd311f031cfafd5aac1bebef81598582b6aaaeaffe5. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/NOHMA1468130.