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 0x7bf53ade1871a1af693889a2279430e2b712f9144572e62c5fe67f9924d8b722. 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/17751e2f-b84e-44ec-82f0-fe753679d3b3.json and https://artists.proofprofile.net/proofs/artist/17751e2f-b84e-44ec-82f0-fe753679d3b3.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 0xbe5e613f29dea721114b3b4f02a4c064d5302143dcf5f998f24b95d9e1c56f76. 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/GBKQU2013867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d92051b2778364ddd3f7edcaac5307689888703b74a19235bffa3213d4ac59. 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/GBLV62022219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96baec20d62f13e79715b094932b1d77704949c516922c04883c8b2f45050ad7. 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/CA5KR2203509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9299704e0fc8fd33f2ff1f8ecb8a2a021e252ddecae2649a49381446b0b01a2b. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/CA5KR2203511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba20b4b7e7fd531c11d3f1f15201af0c43a4f40b19bd2460b0102545e66f7ae9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GBKQU2262245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1494e7826a548092f75ff5dcb0910a1f70891ee4b51856db888e1a0fdf2338. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBKQU2288383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7ecbce3555240860c5d9cb6bb13cd89ea07cbf479875edc21f27a12161e559. 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/GBKQU2341780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ac21c933e3c7c7ae13e7d83b4adcdb2322efe9fd5ec7a0f8eb036078f347cc. 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/GBKQU2438719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784c12575d0ba5017ba6554ca69b1e59b741e47ff1cf50b6b2e5b550e5022f8c. 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/GBKQU2452733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de2dd0d82d25e4a1d83190a49b21bc855e243ed316c50b84efe5549cd932c7. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/GBLV62420192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75a85498c77e5beaee52f1385f97469d37f47a7501b80ed1f76df90a74ffe4f. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/GBKQU2505225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x070dd2b7928c36e0e8fc0206ca703e5bce5a43827d113b48ac4198b90056d02c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/GBKQU2516519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa105a7026dbc73196298267327d94746195735692b1cb70e14847e730965c1c6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/CA5KR2517473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec16cc3932aab027b26b2d3ba09b407df87d98507c8c8afeaba0ab088dc42ee. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CA5KR2517474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa944019683b8b3eee98b481b4ed664922f98d36f77451ab29c52bc4b08cc4ecd. 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/GBKQU2522604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc77facd38c85c81037db42a0b50fe625c91d82ec50eb25ca42f2aa8c1b2a1f25. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBKQU2522605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd0f84bb28d2acae7357a83a635c9f2a753f1b7d21fc64fd7e5148e37f6d089. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/GBKQU2522869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebedef6370d7f93e4fb1fc3a592f6c0db595de3c94493dffa43abb82961b45e. 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/GBKQU2522870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c53b8a01505e32a8cf1989d180c93f717147a0598a71f630fce9849090a2fa. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/GBKQU2522871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53c31f3aafb1c59fd77178e7faf69450691f98cb30c266ae1cbbf250efee6969. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GBKQU2540762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b9ec56b1b2a71de7d783d29b9165d499fdf18c58ee2aa6a29bd839531b61f06. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GBKQU2553662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7fe12a801545f0ec9d5dddb106994aa07ca602694a8987ccd69083cca5a07c. 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/DEH742159244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d3705f90bfdc28fec056d866087c8a375a976976cc615969cb939a842339e6. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/DEH742217644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac9d85cafa2d932342593f3145fb31bc26e7db8958f44f378d9782a93eaab50. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/CA5KR2241662.