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 0x8041a95ab728696b73c9061e42ee0356d5655f8fa5fac1cb3b51e7e53dd5efe1. 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/a1f3716f-d85c-4ad7-b92b-0733b8dc84bd.json and https://artists.proofprofile.net/proofs/artist/a1f3716f-d85c-4ad7-b92b-0733b8dc84bd.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 0x2efa37623e3f9222f4a8b8beed9aec2b67cdab910954bd4c1f84b90557919567. 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/GX8KD2403785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621db5b487fef64ecb14de30bad1359caee037268cfca7c61199582f65b8d998. 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/QZES72555262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5156852ce8cfdcf5ed0a79d3a452983ef41cb2fd463fbd2a1cb97877d9250319. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZHN32550334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b42a1d5141e4792c208e8bce7c8efdc54cbd3436957fde4d7fc7dc69ec7b79. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZHN32550337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2941c719861a6cc83e0fef48a8585e5e3d5f880bf762e1ca75799f573c1dd71. 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/QZHN82583969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae255cf6ad0ca71666553bc57f5fa60172f6be0ac44551d54e49ff52a5282ad. 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/QZK6K2515355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2aefd37a930879014d2f860c38da45e65920c344819a8e09000e8a4efe24479. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/QZK6K2518485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2a272d18f10f94403e66e90f72d733a43f1a6d07cdc0834635964467f7cb9f. 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/QZK6F2550150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305d933b5ed367dc11acc72e1cb9a8556ce508a5f550d3eaa4f3949810fe9664. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:37:12Z), 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/QZMER2555967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce582e8a6a03dbf3c48c47fe71d1aa74f609ab7624fad948627cd4339239f807. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZMER2555968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bca980f228ae6623631433906cd15f556b44c3f4ac4060c1d70cdf880209d6b. 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/QZNWR2544313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ab26f31bae7db4b8c173c3fb07d307ce6cdac045b6b76b0f65bb53b4b294e1. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T16:03:40Z), 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/QZNWS2593780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70244ba74f5055f5fbe6b92c1cc45d721773d809ec457288170748b74123cd88. 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/QZNWV2563793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71535b25fea0d379a77d9215d3e682b6bce9a96b87ba80ae197829c09114140. 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/QZNWS2593782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6402f99c75aec6eb80e6937b0d54e03ccc616c5f4b0257c020e9dd95fd616fa. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZNWS2593781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582b787c525603ca46e2da30e3a36e79fb46a69b35df54b18ac18b6d4d15213a. 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/QZNWW2541602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b169bbe7f853fa51d0373d18888e55bf1b8000e4ce227c8d3f6b4b64665cb3c. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T11:02:58Z), 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/QZNWV2563794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a75aee8bf35901b8c04833da05ccdaf57bf6b0bb2aa829cc5918ec7d5ac557a. 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/QZTAU2588288.