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 0x91f969a9ff5ffb31b03ec377dc0573d75c9e187ffee5988e766a11953695fd2a. 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/96f63179-cc8c-4cbc-bb50-71e4b505ed26.json and https://artists.proofprofile.net/proofs/artist/96f63179-cc8c-4cbc-bb50-71e4b505ed26.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 0x27d9893287fa8b3b721cf4bd55d203664807c593c63d797603f41c3353af71df. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GBMJG2428577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa884d0bfe261c5e893324779975dd8b5d108e91e7a487bff4be4742e472a7991. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBMJG2435410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf79daa3323538a39f6c620a0e84364de1e9f7660c9f8b8cbacbbbc33898da9. 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/GBMJG2435411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca34d1cfd8ad9a752411add874323a702d696e3d93f8ea69b6c9e6859b28d1e. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GBMJG2435412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d171d6280e2bc5f87a81627f53d33f8307a3994695ef10d2215c28ced9d211. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/GBMJG2435413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bc1719d07ade57957341d7f40bf285ce376da42ac2d3d564572f7d6deaee872. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/GBMJG2435414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62f1197a6c4219bb584d8714a1dcc0aef0132352ef2ceea7c04febf6af9513a. 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/GBMJG2435415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4e5170ef1fef04f8e55095945da5bb9dd66658dd5d17f29325a27a61f562c3. 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/GBMJG2435416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce466f06becaaa4032dda899300012b8b74344ec660208ce34fcc671e90bf83c. 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/GBMJG2435417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfee37639821313cd02fb305a2f839d3475300528fd7dca462f2b7ef394881. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMJG2435418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2155f7f69810857d881c232b31401e96e4c19ed54dce55d3d29fe9adaa7a0ce. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMJG2435419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x261c4f1cb772434a56ea1dde9c0a0947f656dcf1f269808f68dce7f8119c46be. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/GBMJG2435420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e06fe493ef85945db780f66c7250fd36fcd42e032babf061ff3460998debc3. 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/GBMJG2435421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf83566757d9a70c098e559fc55cf76c33d36ff85e754d263678d4306d51866ac. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/GBMJG2435422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76c0494ecbd337345b883d6952c947493799b1fd3709e7c6f746e69fff4066ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMJG2435423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5887ef67c0c7ab4ed3de94388d6634f26284e0483ed0a5d3cab2e99b3c0e8689. 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/GBMJG2435424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x554b89117a6c83145d038964607bb52f454943bae2fb9c847b7cb59aab5a1bea. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/GBMJG2435425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7106e36667c7d32dbb9d2826f2cbb275b3ffee778fffc09525b2c51811767c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBMJG2435426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6909b7a4e873883e19500a82083653c694e76dbb74e3374d807b72104e3aa7a5. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/GBMJG2435427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb7e7f010f1e82ae351a706edcf87fef0c5800418b800d9857f9aa65d245ff9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBMJG2435428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64aa1cc0ea29944b6026de44ba468c0a2d7b966c6f99cded7897742e6deb4d7e. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/GBMJG2435429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948e396f2b046a67c1c4e38e06f23a1388b3dab904fbfc8f7f986b97cafed5f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBMJG2435430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1452ae66b1104e972826e43442c3bb28b53393e868b94cf6000eddf248a0bd7. 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/GBMJG2435431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d1f09d1e444bed25efe309c1cc1080baea9fa47d8a409d0a24c46688af7d71. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/GBMJG2435432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00e944a84cb301013620fd3fad829773bcf2b339fc9ab9e2791ed40de1f3cd3. 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/GBMJG2417048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8924ed7f538a1439bf2372129b266cba297fd65dfc7a1853d75443c2bbad70. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/HRA232400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6ce5a7b36da56db04292968f229d5ecd2098a7eeb1c752b2fdb5fe4a22f62c. 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/HRA232400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85d08085306c0e4795f368699c3994a4b9c9a383a58d09f7e1ffad17b2d12d6c. 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/HRA042500750.