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 0xc6ee2e24073c22ea7349885617c33ea14c6f121288fe4c397f3b3e4f024de21d. 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/6ead5168-aed1-42d0-b55d-bb675134b0a7.json and https://artists.proofprofile.net/proofs/artist/6ead5168-aed1-42d0-b55d-bb675134b0a7.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 0x8e8ffac59980304c873a45689e26b4d0759f4f35b0fbcfcc6d7ab78b8c1b8b60. 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/QZFZ22129576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22c17475d47d0a055984f708959d84bbd720a27092f7873db3ad2e0ba95eeced. 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/QZFZ22129577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d702c6941e7aaff7f31f1b86702fc355dcf381cfe92e34c3a76984cf16f6063. 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/QZFZ22129581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8226b8223df5833d1436bc2b760ed99f4a5737c9bb57bf2137f10be5e898e171. 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/QZFZ22129582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa46e3fc98506a65f668ef638966b6c5d5d23a3faebc94f8a3c9b0499c97e3497. 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/QZFZ22129583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c12b71144e8b643622de3701521835ab55ba645fb670ebc7d3820cfd43516ed. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZRP42287790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd83e965f94da0fa5ef45de6fd40c872e8b75a3c396105e4cb4e1360d3149f4. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZRP42287797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fbc7cea95ad0984556cf217123c8cea2d31d7480c96947d93af46c9b57d185c. 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/QZFZ62572825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5025a09154698395f1ab764c9cf978b4032d7657ab992ff8bc197c51a3bd9214. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWQ2452617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa958a171ee4dd6c7fc5bb1816e7ffbcc0c50e908a19b8663329dd01543d7956. 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/QZES82481752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6045eccc43d39eb4f7cdf4e46460a5cf79252b9e7e677451d6b05f48993a602. 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/QZTB32396796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838d703a07180a5b5c756e11c177daaeb24fbc5410e154952d5e3963478b0440. 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/QZFZ42461610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda656a5594e25834bfde77602e3927c9f010baf661a3f1b995ad57f579a98b56. 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/QZFYY2472950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8269e42c5dff0256795717cc9bb091449d60a1f102fa342ef1ac5a2e3227d572. 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/QZTB32372341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad2b49df35c23522aa4308ba621071b290871999d87c5527790fcea3af515f2. 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/QZNWU2320769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc031a33f37ad898116a4778b06473fa14d9ab2d8386ceb91df7e75a90cd3a640. 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/QZNWQ2388056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9f007f00fa07c612641eefc4ba978b14ab0ef58fab4070a9adb34cbe3d73fb. 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/QZMEM2368143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf259da8410d4f2d1ac6e13af9f5fbe9b328a54bacb814cf1310531315e06cb. 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/QZRP52230438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b895427864e593c301cf2a117b4ddc6a4ab6e46a4bfde9fba1376e12ec2d575. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWS2293646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1b593a9b4dc2188961ed736e6beec9d4b86691c2ee385d4f92fd7d23c244f6. 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/QZFZ32118449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ad877ab438b701b68bba2f81e64a74b6ae334306b443d4cf93b4a667a2db97. 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/QZNWU2326418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e0bc98938af1aa1e4829fc2a5b03a4de6cd2abd1a28162f38b81f7a8ec3a0. 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/QZFYX2038837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6363e00518287a015c91a90658905803e47cf3602d910373d5c4d71f32f5537. 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/QZFZ52148644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15688806f13974e7f583296d98062f316d4f9bc9e842df1a6c8b803f6ba8e2b5. 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/QZMEM2205730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9e0bc98938af1aa1e4829fc2a5b03a4de6cd2abd1a28162f38b81f7a8ec3a0. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZFYX2038837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15688806f13974e7f583296d98062f316d4f9bc9e842df1a6c8b803f6ba8e2b5. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZMEM2205730.