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 0x5c8e3c021520d976d4101c4fe5a1508d6b4945b6c4ac06fd5837f6cfa7d86d92. 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/c9af43a4-044c-4f28-80d7-fc921c5e9999.json and https://artists.proofprofile.net/proofs/artist/c9af43a4-044c-4f28-80d7-fc921c5e9999.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 0x2b3db3a479c2dcb90c3b7d65cc21fcd6794ff333d406db3d25c34543cc856804. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USL4Q1753195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395f95c71a1402b7d8ff08927cfe21ea50217e0b4ad6c8fe152951f011088406. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USL4Q1753197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa839a42373837c2502c0265a35f11bc74c4699fdc0b2f56a6c594e186570884c. 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/USCGJ2036465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a2dc1118fca04b3f6d364fe4159091fdcc0d805a34fa4c2f9b20c6c3db05423. 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/USH7N2000031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0384783f1da432aaec69d9649d76d1a054ed5d6284d7a8406737db8bb8cd78be. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USH7N2000032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd484454377b50d9e52588f398754120cb3b9774254c830e5c5a0953ef05d86a4. 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/USH7N2000033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x072865e95344f9eacefe4c6cb59f38990227644c181af759f970452bca2842ec. 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/USH7N2000034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea25e4305d0693d4f67bd485ddfb15400f834cb99a59a2c433c49342ba8ea90. 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/USH7N2000035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a525876e12f8bbd0dd40b351a25c1983bb4691108747148f820589f7eeea973. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:18:46Z), 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/QMDA72176195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc6defacec15f6ea83c393aa13a0cdc102f69fcd798388b00e1b1bc711273e0. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:41:36Z), 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/USH7N2200059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cba915da263b45862fef099be8c4c809d2357480319d2900c23a72bba7d2add. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USH7N2200060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085f0c3ed50a799b672ce118316efa4f2f6e1bc9964e8aeb6c6c89679df65e6c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USH7N2200061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89aa32609d5ff2d3f870724193db768b9d22f4a391a39b7bb83d231878b2021. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/USH7N2200062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c87f7b3ce3f0a1bbbc53205c2e9691821eecf7c4d6400bd58449aaf5b8918f7. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T13:22:36Z), 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/USH7N2200064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x236394da5fef040c6a87446807a26e54f22cc588312525163431535c754a8a3b. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:58:46Z), 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/USH7N2300075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0226eb6ea3b54ce1501ed2c6bd0b50988176dbb849785857b3f7daa40d9ecd. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USH7N2300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31328fa8e3b0706fed7a11e43115689f6b5026e9506e23c0cfd3c69b549eab88. 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/USH7N2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae80eaf2afa1c8b869f426602294d1a7939e38210d723bf0ee778b5ce50b35f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/USH7N2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31328fa8e3b0706fed7a11e43115689f6b5026e9506e23c0cfd3c69b549eab88. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USH7N2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfafddb774c0fa5ec9d2b07e093c01404fc0b6432ff61eed66dc255f3d69f791a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:18Z), 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/USH7N2500067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85b4cd8c1526349957f8627fe44d8734f3caf219eec560c1faa2b33ad109029. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T15:55:11Z), 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/USH7N2500068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf33202d59609c801edaad3a9beb0f07b3ccc1707b41c0e8df4b4b3dbdffc4ff. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:53:36Z), 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/USH7N2500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064403b9d644033bed34d2475c4cee6e93c0f57edd7a9b5b0c27a5bca1982d1e. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/USH7N2500070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe996f25fe8c04a1422aeb7bce354901f5400ad5454a80ce215865c4fad3237ff. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:42:33Z), 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/USH7N2500071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaebd5f9be13fb741c50d0630ca8561e627bae42850edda72251370635c8b8d6. 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/USH7N2500072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3544624a0f530712fb7964d8d4dc1007e7bbdebbdafc36307503eeb9a254cb. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/USH7N2500073.