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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f503846d83020899e613616a728567a15ba96caf9ae67956925d16b6ab827f2. 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/7f34651f-553c-4fe8-a14f-a203e5c6a3c8.json and https://artists.proofprofile.net/proofs/artist/7f34651f-553c-4fe8-a14f-a203e5c6a3c8.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca440709d13faf41642921a2cd5053ca277aab8c860a77ce364461050052011a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a376312b29b43ad497e204ac57bfaa0a488b0e8ba2b2296c7d8c12a2a1983a9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ea7b6edd1bbf3a0921e97cb02a6d4c349ec6164bbbdaa98bde98195bec861f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2097340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f41f06b370742d34d0f77946843ff290c8f37b440a81446ae49027368703b70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bddaef9bbf987ea510a942e2d4645760c36cf38a45d1faed19c1fbf2d50d15f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd2b8c0f15e413b0d13c4e2934e89f9c13523f541c8fb87444f01692190db44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2084170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4ab30ed730291a1407a99dd777bb6e7c556c3c58ddb4dbd3c08ba2756c59e71. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a46f903d873db78f71dc5eb36b106c7eb156ae98d1ade318245105d438c05be. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72886d6f51bd4d8300546505c0d10543ab69118b0940eb3cfe57bc027f568206. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431bdc67a7939e06849dac06a414213798f0d5e688e969d7f60548df7c7bcb24. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARRWN2000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a4bc56402de3aee2d23ce9c479c024781a123555b08139b1f7a8539d1f585. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARUM72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18855e5a5819d738d4684c982655bbd0b1f16b49b38eb7edfcf40112e2f34f2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARUM72300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b189c3bd83f095f5a208b1aca20c5523b44ead46746a5b0d20be012d8a262e. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282365001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6231845ffc9e649c0cf3462e8c5cf41f6b91cbf1e397eadd6916759920f8c17d. 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/ARMSV2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744d4b631c604ac4c9b2fc0aef95f7bda57d2453c341f121e7f7560ceb5344a2. 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/ARUM72200106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b3b929128163664d9b7c7177e5b2de9cf9c3f7c91050955c58f557b13664f24. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARUM72400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65e228b18d98db627acf51f62cb31735dc6333753749c79095ace6f6919c44e1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUG12305257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa241cef0327b5d69376061b47e275e6f728cb85523e60485a639ece70038b558. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZXD92300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a4bc56402de3aee2d23ce9c479c024781a123555b08139b1f7a8539d1f585. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ARUM72300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e4235eef61be793f6072bd6e61fe775fee7d73bbb424bd6039a3e9a89c3fb5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZ7HP2200051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ee70d7a4a62346696556e26e97659c12c40e455b48f61329eda08e4e02aa465. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USUM72305982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5ffba62766773a5d0d0eb35c613d177746f352e8166c69f5de86192a1029f8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZRP52422663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0518b83bf6b2973bd57721f253d4a0685ec3bfe08bc7551762221963690ce4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282365002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b189c3bd83f095f5a208b1aca20c5523b44ead46746a5b0d20be012d8a262e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282365001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c6f86b87d2ffd5880f809ca4ffdb788bd0ff19308616462da3e5dc2c3f86195. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/UYB282365000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb6415dd90608a5bca29df1d6bac19a0bff0e7278a0e341814ee81e449fd5e2. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/UYB282365004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3f119e447f2972a4e33cd2cc0330c4f736f2390aa085dc791274c56692553d. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/UYB282365003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc447d92a93d91a00de450faf1f00d4d9b17c9844528d9218b21320d90ec439bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/UYB282365005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de0713c2d83c172bb8ebfea55ef4e2893027eb7b360acdb8566fce9ab5e0988. 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/ARUM72400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3304ed9582f35d176d3f6fb03e5b704fd7f27d506c2a7fdb65577ba9ddbdfae. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARY4P2100195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9df163b16741f52bf07a86ad94d6fd970a8ae506b6c55ef0497ee7ca4ff639c. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ARY4P2100196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a14e19f84f176d21338c96297191b9e405d966644d20ea5ecafb138ebf5fff. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ARY4P2100201.