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 0xe3859730c7c1a85bb0ab001d2daf33db04183a4f4e7193c8dfbc67abe4f17e14. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1cd47140-9dc4-451f-8d73-cb704d041d3a.json and https://artists.proofprofile.net/proofs/artist/1cd47140-9dc4-451f-8d73-cb704d041d3a.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 0xbee8b03f9584992d359f6cda532f96bd49755bf0877d96b2228c7959d2786b8d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/CNC072200538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e7de67e3183faf843fc9d1cac48c6669b6483c7afe96466a590cca74a39cfd4. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/CNC072200574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52020093e2d940a350aa2bb4df70dda38a6d1e4a492fb2520dbfbe54b8a0e40. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CNC072200556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba30246284897ddb295834a49b07f6c7d294436f4dfd56e7a5c35adf4dcd198f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/CNC072200555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3eea508a0bed41ac14a1a11a8076db52f6467ffc85df6843256b8771afead16. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/CNC072200537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b737f59cdcd8682d5d5c3c86f1bb13e44c473bd0b70cf65c4331a591fe6084. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/CNC072200536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5feff7facbc6598bc8a6db074106c38be2ea73a2d65f8ad64bac79b7576781ee. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/CNC072200535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73b945dbbbee018e75aeb864d70adb4adc5e7d65ea4b4cbbaa250078dd439eb2. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CNC072200534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb465eb53161ad4d100212dc5f7fcd33cac6e6ce27b0819420601fa68e917b851. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/CNC072200554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4bf607ed66024d5ecc14f087493b12753b6c78397f40b4142349f416220f1bf. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/CNC072200553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fd8491b25c1097f26bb93537bb860e8fe6038964860569719f8bf045948144. 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/FR96X1913051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8a245074b8ef252048847823417e5f9c8139c548d37df18ad789d50b07ad4e. 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/FR96X1913053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdfd1fdeee13d5a291861de51a7f476caa42ee573155ca6d7e4ccdd9a38907c2. 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/FR96X1913055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7543163b577dc9ccd5c68a9b4cbb7c3c41da89a1b406d339846282a7ec07b5c1. 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/FR96X1913056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b6bc0d9cd5a0321f647d7cda8f792813cc245fda9195fc632be8f9bf225ca1a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/FR96X1913048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80445855970e4567ebc1b2572119014c9b669fd84337be58f983b2232391a5e6. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/FR96X1913049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1991989b6463676e139df37023be2b118de87859060ea73f71ba7aa59cc9a84. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR96X1913050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd71932c83e073edd8c1c15049cffc7f26ace0558ec2948cef9af167e508dde. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR96X1913052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc730e975cce3bfaebf42197f2cae2c9b141e7e1e17b56a89ecb858f0e7e943af. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FR96X1913054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x241b59a7b230fa9e79891e42b26b5bbde2e364925bdf13109ce5497c07b53666. 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/TWAE32100273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb34bab5800faaeb2f576c29eda339910286252c8645dc54b0c11662cf0488b7. 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/CH6541642954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa049b806606ea7fb8f4b84897da4b93762826dfe4952eeac7933f6695efafd56. 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/CH6541642955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec141d8208e87a70f88242a5d3f69db4d76a3ad72d591cb86830b80b211b081. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCJPK2075988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf7a1ac20e30ac93e8988d3ec1762dbb0a664cceafede763e25a034b56247a3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPK2075990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4ac98062431d2fb5a634687498658f33c9b62731ff5e61cd649cdb1fa77f9e. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/TCJPK2076004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f0966a519c15f81c7efd64be40af879f948406e73d3388afdf72236a8ea793. 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/FR96X1903643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa458a599dac8ce7e64b76b041e8a77710501ec8a4c9fad3956dc49276ebe9dbf. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/TWAE32404285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3cf3bed2c7016d2f7b0dd41e28ef16cca017b57c50939dd3b3df03888d1ffc. 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/TWAE32404288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016d655b607d82c803f9a55c212615943d1efe954c3eb390bb47bd037ed38168. 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/TWAE32404289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0fde29b799186c6f770a6402df7654bf58c3baa34cffd4a0c0630c453805790. 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/TWAE32404290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9861fbc2fa308f3b1987ad1eeb5202058e10c0fd9c290ddcbcaca1c63452ea92. 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/TWAE32404291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908bec791e955460ec59bd1c7ec0de5acb22310b1ade615b41a62b1b83e6af3e. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWAE32404282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c89df52ea50c8d9cba3e731d10ad4c30f2626bba436d7c55bc48c482b27c3fb. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWAE32404283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa775ba29e55cba982e91077a16a7048692ef6534d5566ebc9d3bf0ae09460863. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/TWAE32404284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3121004bb09df3fb022608874359887c64bfaac4c75c3de3d4b49fe8e6457a67. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TWAE32404286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d83a28a8bf611e4e2161550432c450a478bc942d6a4bfd1b75f1ef69fb68bbb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/TWAE32404287.