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 0xe0554bcc194f973dbffc6de964a3dd3fdf9e15fa93b59219c53f3ee0fcd5b4c1. 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/e1fc355b-2210-47a1-b361-7a541e1e0937.json and https://artists.proofprofile.net/proofs/artist/e1fc355b-2210-47a1-b361-7a541e1e0937.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 0x28bef7eab327c395e0123d8aae7e8442d81063221e107069c386884ca7881ec4. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZMHL2411055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae39ed3774299f3fbff9a8431829c2558e821aa38650243146b64a8baaa853ef. 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/QM42K2497129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf22c6bc09f36b8fc8259ef8037c07d21a21f83676a9f8e46d4e9290ba47adbac. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZS642586523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63594185af7e7fd57cbc6f738b1cd2a70e701291a012388f15f4fbb6e555636e. 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/QZPEW2518791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384df9fa54d17c69329c15d7cd0eeb0f483b25b711face50ab8d1f55a8b4d133. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/QZPEW2518792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73686264fc8b1a1e05ce382a25175a83253356421fa6ff2245451ba15fa311d6. 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/QZVEM2554526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5c0b3ecfbfac47273c5a4f5547bac1ec2de7867f40b11284d85e221572eca4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZVEM2554529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c886e83e1726e4d72a3a96ea5294340436d9a715a23c1c59ed839bb8226f062. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T09:56:31Z), 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/QZZ7T2527981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960af92f3cca5d4ec2100a4db44f60b2d95f56208aca10e1f727d44127293a6a. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:50:45Z), 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/QZZ7T2527982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4496bcdbe0ebabafc444a8db9402d4dbe1dd22a2b551bed2e955b775a5ef3461. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T07:09:42Z), 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/QZZ7T2527983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622bea13c2337bf63b65c3a51b7ac83147175026ef9bc0edcb8d68829d3d8ba3. 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/QZZ7T2527984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67900a0790eb4f0ede66ffc66ed0721ee16dbe17aa47602f1ce4b4baf4d53f71. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZZ7T2527985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd9d57211bccfa7c2967fc00d32ab2fba1bf335cd0003ae899894afce7999127. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:50:41Z), 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/QZZ7T2527986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e71bea6712935f85219e2878306586f77dbe9214e1827947c9eeb9de39f211d. 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/QZZ7T2527987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x904864153c655614f137b14d5374f56fdc2e85234dba08ac7d5676cc168da52c. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:07:50Z), 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/QZZ7T2527988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940c4f06c88753d4252387f9a2edb74573afca463b683ea33ea7cb11dbe93cdb. 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/QZZ7T2527989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785fb989eb2253f7bcca5b5a080c7714bbb285296d8c0de79eb9504e8681e246. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:52:01Z), 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/QZZ7T2527990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5fa8079bfc968586804e961a4d03856112002dae6c075873fb5e8e18269612. 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/QZZ7T2527991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2782562f4cc0ca60767d77956a73284e3eb022bab8e17c6dc0eb95bd4d8f67. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7T2527992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbed28ca0717ae3cd1e71cfdb34c1472b3780eaa19725e285d8ed29c7cc14fcfc. 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/QT3EX2529397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d3d1cfe99cf7155161db8ca5922d2dae48e4af994809dcec352c2b8cc2a989. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QT3EX2529398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc132806cb60d7ae5a4a35a09d8ebde675d3207d6a871481eb91a7cdfd93af192. 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/QT62U2512149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7876dd82e6e2e51343fe5e2e1125b85181b70d74c986032312e8d9900c4550e9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QT62U2512150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918510cc287260f605d0db557de1edcd8f78907c8339af95914e737dfe0ef9dc. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:33Z), 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/QT62U2512147.