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 0xd6d53c7b6aae55db29947e0f03b225b1de66f85eb2a627dee91df702dc24eebe. 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/170670ad-cb24-4449-93d6-e83853b64472.json and https://artists.proofprofile.net/proofs/artist/170670ad-cb24-4449-93d6-e83853b64472.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 0x9fe745d63f4726adad2addfa1d09e9cd1eef62058fe80174a71adb0f9a1ebfff. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:28:32Z), 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/GBMA22375635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d495d67939749c3fa653c34f21e61d608cd3c36d33814935cb65f3d33455947. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FRX871595928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaeacc44c17caa7746db0b15ae80d21cc84d48d75b220ca1049dad03ebb8f9cb. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/FRX871595933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b0cb29a35a3471fde1ce9d93a8380389c187886add2d3dc5addb5ef0530fd0. 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/DGA0H2398227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe734f493fed7c01d501bcf46eb0ef9d6439fffe3eaa1fee7a5531f0d0fc8d016. 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/USZZR1203122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fd83cbbacf4f981ffd6b008249949482fe077109fe9e4ec1e756667e2e6f9e. 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/USZZR1203093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a9f14cbed5dbf04be9c0c403b34cfd4818953354482a8c6f7ab0902b445b8c. 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/USZZR1203094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70770c024ca62eb7fda2ec6aa76d116d0f1ece9d2a0cb8adc089197ce50072a6. 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/USZZR1203112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f33da05c6a36175411dfbcde109960b34917f4f9e3228ad37b137cefb139b9. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USZZR1203114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98bc11a96fc4c32442486c3fb0d503347b52631862455ad065a45d02282549d6. 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/USZZR1203103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698dd152613d0e137476676f290b754cc41cd8241736f7ce0423c47be30a07c4. 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/COC011430241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bbe83156fa592309f421a568416aa3c0b984df5a45c1f363109132e51cd00b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/USCGJ1672655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017aeb75bc82c320a1ede0965cd54d0ec1a11f683253b4f2092ad1b4a1248f19. 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/USCGJ1672656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71395161e1d5817651c50939e83b6e0b5fd0208c665f0bb7c19718558cbb11ed. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USCGH1748944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce91a7741223c07c0b58d4ae06864202e49d035ba04c1ca497f2e2b555c87544. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/USCGJ2140839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51c6852b03aeb37dffd77101ae95f5bb6c2dc4ffcc835a7d1d1b9d9464563e1d. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZNJX2374805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b37dbe4665c4cf4681daa933a91d5c56985014e7b7dca149688fd7d1169461. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/QZNJX2374809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829303a72dff62bc80f73ac9f1fb007fd6561437dadd1d90ba3a469b93e8d076. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/QZNJX2374812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d56d84629d896b708323141948d4cefc12984da6f90a03744582c580589126f. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/USHM91907796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f2ea59ef615cc24b9f0c78f2dd76cf229631ff33588223786960ef1667ecbe. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM91907800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2d5456df6df1d743e1ed7b9168f325fbf6ccf8b5b44d07b58471b0dea3394a. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM91907809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0388c5a8b0c88a7d0c0f29838e47544ab05b2faac558871456241a09ef6bd814. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTVM2346882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b5a637c72b46e0434a0d81e5fc1efab1ba9d91178f7358bf0aa168d1800cc58. 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/QZNJZ2337414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29cd38614c8de0de679d11480897a1f8155923ee53a48eceede010c1d8b61eb1. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZW9L2359428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2390337e84227f61b6d90a9f64c90715739557df6aeb1d8679aa5d029ad533ca. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/QZW9M2345313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd394ce425af03b10c253eb6528a11f37cc58e6acb1b607831ba05b4428b4ea06. 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/QZGLM2588983.