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 0x81a449fa2869cff2618bd54799cb85421d4c0585ae167e644149bc8a250cb42f. 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/ed893952-c993-40d3-a5e0-94a3723d2c61.json and https://artists.proofprofile.net/proofs/artist/ed893952-c993-40d3-a5e0-94a3723d2c61.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 0x6873b4e08cda71c33c358e59824d947c54de9a1d4f1eed6cc2e6f350a08c00a1. 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/HKG732141361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63049d84c9e670af9d1f59c6f5b0e708356e6e9617ee2b95c5a990b6ad402366. 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/HKG732148141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d32aaa8721c81f45a18809cc08aacf212bbf2d5f98afb5db91ca1acaa8c5fae. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:56:10Z), 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/QZJPM2471319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4200f87cfc9837324932f20858fdbae3c3974466f51246ded01b520d2f2d4651. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/HKG731572806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2784002a0067eacf6cf968f6c59e757134074dd7f9695961568b281b987ae61. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:26:41Z), 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/HKG732317862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb817802e7a27f5e39640b5d6dbc1efed9947253d69a11cc77f0e43f028dc76c4. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:36:16Z), 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/HKG732224939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc0345e87b2fb2207bc1f77058179426b45cec07353501330201361723b2188d. 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/HKG732421637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba478add5c01bf4c541cf1b6f12f626033e2a69a2c98b3776d1812125d871625. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/HKG732269052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e940d74ba502b5aeab07e6da47c73b5f90bd1392e966ed3d49d68d399f24016. Chain 2 (Bitcoin): anchored in block 957919 (2026-07-13T23:58:45Z), 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/HKG732314996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c75407719b5eb089521bcc35ac1e016637d2a6ac9cd163946437d01e84c2ed7. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:32:47Z), 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/HKG732281100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c63b52f767431d0c7f3b5676845cff60ab11a275df110e9381ced639d0f9171. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T07:32:49Z), 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/HKG732292150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b44879d61ac1682cfe6127ec1aec0a7613b64e84e5c3b5e1ba774546d33e63b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/HKG732356637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cdec0685d5063b1394cf0d4b8e5eb3ee611e4f377174a64a055a9edadf717ac. 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/HKG732382627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d076ae425a1f290f4f5acb9e8d70b48212bd07e7839a58007d317745ad9efd7. 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/CNZ632300988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7144be352df45378e0b56fdbf149b9514ab94e318e07e780cec2d1db643d2e97. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:39:46Z), 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/HKG731681857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db9966d0e8f51229d2cae43ac7d02f1c4899435c179e1c0dd43f4c111448558. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/CNZ632400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef58f6b312f9f5acb9655236b34617efdefd739b9ff56312e639d15d93a2d1c7. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/CNZ632301438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9645299c4dfad92ccc40be1b771e9cda153182a5de5c6ad0add5322ad03f0a68. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/CNZ632400644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7311cbe449ffdb76dd28deb7b95e2623b2d8f3bc8749cd2d59ac13e580d1af. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/HKG732410047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd04aa6dbd54313f14abbb0f939173d2154424299d248bcb63ce9f54ed9cebe9. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZJPM2428885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d5cd66b9e2cf5db9a884770fecfe867454d7eb09b76c62bfbaf24361bb7df98. 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/HKE672400938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524a3ffe6fd7ddf39c9199cd12f711ddb3795fcecc8c1008a510f2455da4f096. 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/HKE672400941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc724a4a3ced0df408f934ba5b44a61025f868b920faa019ff8b5ce040fc8a67. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/HKG732458782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55399e6096f7acaa24fe6e01f2261195a71f217687d08b4d72ee9ed1863054fc. 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/QNSM12400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee935e0293a4356e208a3670cbc7c705717f85a416dee7d45d5d9f5dc133695. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T16:08:29Z), 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/CNZ632400112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac37420d75103461ace2213707d33458c76a7362ffe810d3584b42e445217d2. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QNSM12402305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dcddc0e660aa9388e9f11c7805c9b4be06971cb6ef87f73f8a9a0652e44d204. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/HKE672500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4fbac500cd53ba68a15cd9354e2207c35cf9106e56ed0a99e297cbacc2cc35. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:59:41Z), 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/QNSM12400839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f5af0fbb7a82ced74644cefa853de420d3db0aece0aaac717b1024d71ce17c. 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/QNSM12400934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66c24b8343d4a453e863e8d6936162014e480ccef79e659d23d6e0b79eeea9b. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:18:01Z), 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/QNSM12402584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71ba345e102b9ae0b4df41f480d5151708f939cd574c60595b6f273e35f2b9c. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T08:58:48Z), 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/QNSM12402452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e986e6bc8682170f8e59d529192ba0b9487ea338522f46339ccb013adb35ddc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/QNSM12401200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7134de4fc6dcaf0b5c70073fa3577244a99f6af423995a91b26ab8edab8bca21. 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/QNSM12403666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8aa2efff3c85e1bbc4eec29de25b7f4312b3c8ff140c446200230628fdf69e. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:47Z), 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/QNSM12403593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd35ec164d3cc71af8fa9b4a714c067a0d315e4743467bdf82400f4402e9f95. 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/HKG732533877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21447d132a816bafc027cfea7eb39c9567709b47e9997677c1ed0cee1eb32c7b. 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/CNZ632301134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463d9b7cd4c03f38fed7d751300c4569adeb2bcb269b07c6bc2edc4cff6ce560. 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/CNZ632301130.