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 0x11d99f8c62fabe12ba87c8416fa27e3abb5eb07c0b90613d71e5612a8ca695aa. 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/863280ac-11dd-43cb-b3be-7c9f74c3a677.json and https://artists.proofprofile.net/proofs/artist/863280ac-11dd-43cb-b3be-7c9f74c3a677.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 0x263077b8800d82b73d318717b575526e999f8762dad53f69a3daa205ce2dc779. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZDA72109661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf21df5e5b4493891930b7bc86f09c084b36f038f2f771fd22250468dc831036. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:43:17Z), 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/QZDA82180262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf40596e0b447d429bae51efb6df2cfd5c515fafb9563c35a86ea2a001df3ba33. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMEQ2120558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3465003a12070a3c7ff30736946b41303e280c34e5bc53d57ccb7fb7ff0bce80. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEQ2159784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62e6a4d95dcb18628887b1d1791b75d8ecd42091bb4bdd65404a0e315bd53ad. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMEQ2157219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e833cb996baa4b8f59e6d4f4d3660cad82a7ccb2270cd89c8da904275762ad. 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/QZMEQ2159788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a296ee6ca56bf9f04264a5d0428509a417d5fbc685505741d80ba48ef32c45e. 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/QZMEQ2159782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee3de1693441d0521bf1071c26fb0032ab9d080785c343566f4ebc3f9b11f50. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:54:03Z), 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/QZNWT2154288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c43cd9b8b32712e05a8f8761c31eed8b95fbaf01275e49d06f97365f34190. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:21:11Z), 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/QZNWV2197171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb459edb6c11d962246349a3e3bfef0d2ed6d7601343a5383f9c691b9fba3bff1. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWW2165062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1ecf60d850279efaf012a2e8de953281180c51371862d243f4822c8904dfa. 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/QZFZ42205499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8263d37e6607f6d40c83dadd850b5c0cfbded7902c50c23c86a500a48d6b61d1. 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/QZRP42294581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef346db5d32e7f023f002c16f9063823306894e90c4b540b351ca8e432d9c087. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZRP42287533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7daec688811e5e089eb313152f4cc8584e524fe0cb98c3bcb7c68adec8c8e716. 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/QZRP52207626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa584eaa32f19715c77b4e2389478a93f3ba60b9fd83b800a0562c3960e602b33. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZRP52256922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3e1ab747dd54e13bed6cd3ddc4a9c4a2047406873bdef10f6e2e89f7215df1. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:31:44Z), 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/QZRP52287158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d233dc6d1b3a1eaa5c3a19b15607294192febb47d01fd15168a6841c6a11492. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:38:08Z), 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/QZTB42261748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1de49e6a6d01e7c38f279e6a672ec9266be846d374424c1e9705eba469964add. 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/QZTB72208962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b94e33b8bd1b893ae5a8638914ffb98a6e98feefb0e085658eab374a3709abd. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZDA42329539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86decdafff3b74b413cdb118c12e3a36027744696c547234f0be8025d829b485. Chain 2 (Bitcoin): anchored in block 957839 (2026-07-13T10:06:30Z), 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/QZTBE2362455.