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 0x9b6b3852ee27446ac7df213ce949f1daf69662690827e3ccad5a3f0cb2ff7e48. 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/0958803b-6ef9-4a04-9e93-4f7d04f4a3ea.json and https://artists.proofprofile.net/proofs/artist/0958803b-6ef9-4a04-9e93-4f7d04f4a3ea.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 0x18db1598daa06a94c4f75a97a5a83d3f02b997402e2fb31a54a0c469c85c5b98. 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/BRJ2V2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b0af98dfc97ef813e9f00b0e7aaa667412b3e90358a9557d1ca5a8abd11ae6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRJ2V2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440bec4c1524a4cc8793efb93a8a22a4fd9ea0a03289809b8092df89e785f26b. 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/BRJ2V2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4508e6e058caf3fa3571b2470e6ce7568f9332fd9aae5cf9686b564a8cc17b5f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRJ2V2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72054600fd561d798ad4e1e004e2c11288c2d39334f809872581f1dff54be57b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRJ2V2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4768cc260388f39b125d51b3596576578430135b8ae2298ebf06636d7c8e1cb. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRJ2V2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8db35c860a529af1f176b4e86da445592d61ba15b819c8d11c485ad8bba5c1. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BRJ2V2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e3eab16b7dd1a722c9cefcf89d4f83cf0a0b343642dd59124bd35b807e014c. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BRJ2V2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1df1e55bd824f729fe093e9d069af5a2732e586acca131cebad5076af3c28f6. 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/BRJ2V2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58655687733b3efaff372ed48fd49300a22e93a84d233dc36915b3945afb45c1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:25:59Z), 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/BR5IV1300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d74f3c2e8c934fd8254f7ad114277502a62a4cf4958ed6edc06f0acdf22a20c. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:39Z), 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/BR5IV1300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ff967155a7f4e66d8484fa81640a5ea1c89d1c9368c279fdb572e88532e5f. 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/QZNW72244963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa6661a2f78e7ce18653099a9473b004fd4427b302e4f56bb3153499a228504b. 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/QZNW72244964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5ff967155a7f4e66d8484fa81640a5ea1c89d1c9368c279fdb572e88532e5f. 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/QZNW72244963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e11b046c03c2c470f0061c54a9d62ba4a71c6799392b12349372546d93de9dd. 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/BRTV52400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x927a0c1b1f0a1db7d48a9a030c5061224b6c87fc00fe9bd4f63ce9cbc7aa8c45. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRTV52400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd041817d6a42f720f84ac3f4e2762bbfee0264ad6244238f9f5959616a14c095. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRTV52400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe919a205579b67ed464f92d933e3803913af243dc9690d48eaa81594b75bfa. 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/BRTV52400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff4f8afa70329aad22e51e75b59110a10addadc647217990242095d06dff5e73. 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/BRTV52400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5749afe8c04cda6d7a884bf6ba2ad53fb86702dfaf97dccf97084c2a43258e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/BRTV52400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ec5e0151176c2aa91f14205ed484efef383e530e81137b0d04485909ecc730f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BRTV52400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b581d886761f9cb48015c727264ea688f09f5a4d03f953911a5b2e08abc21ee. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T08:02:35Z), 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/BRTV52400004.
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 0xff5dba4c51e9068c187577a98c41faec9bb641b5b1941ae06d7b4b7737f8853d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/BRTV52400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d5e61b4f9a3cb3e4e49d0ee85c8e9eaef71221ff6374ef6a32a1c5769c4066. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BRTV52400009.