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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 0xd39841f95a015e7ae19ad3cd73c85e4b70e16b295f27bb43b60b635e8a18b2f6. 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/2f75c8a3-b04a-4c04-859d-d342fdd9c79d.json and https://artists.proofprofile.net/proofs/artist/2f75c8a3-b04a-4c04-859d-d342fdd9c79d.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 0x51902da2b9891a57c2c899973eb7dd3c0f45c031cb37a6984dad5b3940f3e73c. 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/QM3DF2267778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b32f7bbddd237eeddb8b410f73ed2deca20c12d218916c26aab46ff35743c1. 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/US3DF2403223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01096f887e97175615ea49f4931733ba71669db862c0f115c24ac8cc7dfc2eae. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GX4R52571494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x611c3730efd0c04b30ad7ee6f4f99a6f2accf9fdceae748489dc796b0bb74e17. 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/DE1H12501056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb055a2ae9a2216db5c492a41ac802e5e2530388012a264cd31885fdd28b155c1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FRX282576111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0b720211ef5a10fd1d95a137c6a7b506e0735d3957095039e0377cafc5dd47b. 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/FRX282576112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb8b9e8134deed35042ecae7facb9cc64689faf1ea4dae8ccde68f719d325c54. 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/FRX282576113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc31ec07e9c2dd1d47fe3b55fbe5941083f12c8c4fab1ba2edb563c208be41f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:04:17Z), 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/FRX282576114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2887508dfe9846346ba74c96e2cf9e6300fca758314407e18cd16eeb829a4eb3. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:16Z), 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/QZWV32560376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab322f97471e29977721d67711b78e860cd10b4ec073c5170bba5d2b6a437aa. 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/QZWV32560377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d629f61760fc8085bc00d3623e371d4eac88cf64fbdfb8320793448da430131. 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/QZWV32560378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280e5fdb3e154e72012b9fcc09734c1498f085cc8915fe50d413abcf0e95ac41. 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/BCD4N2500080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e880ea06e01cce75f3602a7a1ab29670001ac4dfe56011cdde4022ddf155a. 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/BCD4N2500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3c82acc7232010a4bc985091a19b78d1e5e9d6044b125f0e7ef5d715c6f46c. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/BCD4N2500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b86503aeb4417a869b3185d17652953b322c1e019bdf45c6bfe5b84f966a70c. 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/BCD4N2500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54a48ade71d1426d50611931e4f463c7d64ac2fea84b695f8e7bcb46d6fda9e. 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/BCD4N2500084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4bcf5a0d9051662048699e22f3bcb95ac929f2ddd696713cf2f9cd2f06975d. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/BCD4N2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec370b184d060e3a9d8e9f5051e2f463b68511d533243b76d00bb436d88ab84. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BCD4N2500086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee479a3ac2b58ca11e795219b117fdd474d4db44b0066486567bf03b560ea1d. 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/BCD4N2500088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3f2345b6c73b389c7f900d522a51dc6858e5407796c06b63774defaf6e610. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:43:03Z), 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/BCD4N2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2a393994476fb3273430ef62eb0f2e7c921816a11e35d5a552839022457e5b. 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/BCD4N2500090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16980434b9d4b6c3defae5a6d9c7bac6e9fc8bfb39ac9277f1af2049f5a43427. 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/US23A1565813.