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 0x861fe8a2c477e7f5f3cf5567d5ff11e7afbeab752d36b08448d45bdd674ba93b. 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/cc65fb5c-7787-4cb1-a210-bec7985115e8.json and https://artists.proofprofile.net/proofs/artist/cc65fb5c-7787-4cb1-a210-bec7985115e8.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 0x395466e7bdf1d24055136d31fd5c05644fd214da84106415a96f005780b3498a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLA249700223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b67ef7558cf062944a68992e7c71bd78c5d16fe84d8dc82956bb6a90d1a3c77. 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/NLA240402095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441df3142760cbdcaccb87bb129bcc2fd2d6c20bdcf46376efb91149ecbaf29d. 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/NLA240100357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5431c7635ff757d3889604a1476b615f7fddb48f0324a250558c35c29d40dd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLA240100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc59ee0b4269ad631ee471e6d875afea395a5b631610457b0605eeb8ffeef3c1a. 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/NLA240100099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9bad3525b67f5928fafccd9773ce4438e896c527b053dd62c19a200f01738b. 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/NLA240603847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccde8a527dd10cffb41a2e77ca08b58a0e72f3547d33a1b85fb0daf9981a32a. Chain 2 (Bitcoin): anchored in block 958351 (2026-07-17T02:38:05Z), 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/NLA249700230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46b2c2b5a863e466ce62a165fd1b6b50b213d0fa6b205cce2cfa21d7ed1f5c. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/NLA240100355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45bb584d397fc2965877d3204f6ec068ab330ba5a4e642a9bd966e5a9d7c211c. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/NLA240100349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4499cac261ee7c125af6d854c724284423ba16ced840a95c42c3c9d79cc6d2de. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLA240100100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x456d7c6e8cd7582a38903172da12c86209bae14eee331037ae8c1afe9d8cdacd. 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/NLA240100356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979ae51e7ba8b6bb0ebec4ee887974534040f841be6a491a2eb64b6bea4cf03c. 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/NLA240100363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf855e9817af2f554bb39c64d69b98e4a276443c66dfb1d8317e028fd16c5c1. 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/NLC569900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1790b0f295eda13c023f6bbe213406f4d942047f9eb546ad4eb3b6b5443ecfb6. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/NLC569900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95457e2ec671bc3599662af1846ace2c1c152da2287d40161dfbee16decc1e23. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/NLC569900014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aca074e4f87f375cb173ba0c9852e9e25b7022db2314780b1693f28d9a355ea. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:01:38Z), 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/NLC569900017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813e2d59c0c2d723ab3dfe658a65a855ec28dc7581b31ca3de58f241cfc140f6. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/NLC569900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd569e7db609c579c1c9478c09fe0c3ec01175e726899eeed2ab3e12cdfab31a6. 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/NLC569900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717401aa293d7e6732f1e8923cca05812c65b8ace95b9e0ff863ec874cb7bb0a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/NLC569900022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c54981f1e551e14f1f1c9dedea6a72a4cd06138b73612aee47165597592feb1. 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/NLC560100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e8339dd436a5ebc199ac86d7fe49ce0368396378ea4fbfc37165988e6fcad2. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:39Z), 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/NLC560100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf015b08e357a108d694cc902f85c3cc4233c3a13bc4d91405ce52bfc0e76151b. 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/NLC560100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x426b7d43ac27b414165665723b817d712b0913f93060e829e4669e2e9dc33755. 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/NLC560100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e2e96e8a3fe2f1bff66cffcfb1efdbe69708e1bd33c165a298a36499b37ea2. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:57:40Z), 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/NLC560100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd7b9d60acb8ca295e76b14a97d307b2c237b60fe6ab240fac5dd3c522956b. 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/NLC560100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15663e12cad2b4ce2af798f5e0b0a0125888f6770fd6e6e6982246f25cc21c85. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:11Z), 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/NLA240100276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386dbfab2f2edd0cca940229cc578d5a4875901c3429e661527bb27715ea1649. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:49:10Z), 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/NLA240100351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f62763ea9803dc673d50293f14b2499152d36ee8bb246d30808162361d5122. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T04:53:19Z), 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/NLA240100097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7133dca12910acc2c547208c7ab47c7fc92425e90847b7528a2a36c5f69f2514. 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/NLA240100348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c055b2f57db599320fdb7550c2745d342ba0a2e2e21d93377f232357df3f3c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA240100359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa895bec11ac50a450a9ad0ca0868c07add386e83759e48da6677b94c2884ed6e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:53:13Z), 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/NLA240100362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ccf4dd2703192ab86e449cd090b2934cac68cdeec9bbfd2688237c5856919. 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/NLA240100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474e7c56d1165bcc476f4e77e529c5e824fe4ae61b28a987df0021aa3a17217b. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/NLA240100360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1d2f0d15e69990ad1b5575ed067d38bd76f6da8cba829e3ae884f7f4be9e4a. 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/NLA240100102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f76a6dabfd271f45b17679217ddfc67e7d9a8d7c7d777a50c27803347f7b7f. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NLA240100353.
The Hit-Collection (Tol & Tol, Sedalia, III)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e24e8ad31db08b593e62f4fc2fbe97b38586d06485966d4cabfca68b46052c. 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/NLA249700225.