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 0x5248c56a51c6a99b5daa79f985ac37037b4e8f7cf1f2e14ad4b4717925ea85e1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e7ee9a4c-2128-46e5-8d38-ce41f722d173.json and https://artists.proofprofile.net/proofs/artist/e7ee9a4c-2128-46e5-8d38-ce41f722d173.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 0xe4776ef986ffbf81703964d3cd32f6cdc46a7d814bf30f9dd88b6e8cc8bf125a. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:13:41Z), 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/QZK6J2276034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb9c24a234a5cc13f7fc957b439f75a6e38e1038f33cf14a7440751cd0622e1. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZK6J2276035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae04579794d76df11f49d37b36c7a7341349789bbfe139a8a1a2c75ae62806d0. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:04:19Z), 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/QZK6J2276037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6213d8e18010eebbece58af3cad67e8e98df660b85669fed8543abf4117b997. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZTAZ2258168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eebfec79a0d99d92458ffa61a113d1431459c3e07b9519850c422782af0d9db. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ42326424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a64eaaa1172d8d35cef89ba3c64493c3351343207ad35cd2c2d39111b85dc3. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6Q2311697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf55465212c00a495d911f3bc8662165cfee5a908582d2c7a213c59a0c87fea26. Chain 2 (Bitcoin): anchored in block 958947 (2026-07-21T03:30:55Z), 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/QZMEQ2395786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08a64eaaa1172d8d35cef89ba3c64493c3351343207ad35cd2c2d39111b85dc3. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZK6Q2311697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df6803e0c30c889aef78922292643df2a70406a89b445f814e72d92e8e5af87. 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/QZMEQ2395787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5b9884fb62ee843c77cdc08142c2aa2f309eb5c5a1089bde78f5e1d0f9019a. 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/QZFYY2399573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d2c86ac3d5d6afc0332030392edb2f87eab054a4fa895f42d0dd05a33a3ed0. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEQ2395788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12371b3ed61bc218b39000bdbbab80e3ccbc3d8d649e7a25fc7fed3b1dbb768a. 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/QZMEQ2395789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde0642affed9a6b96b5d1dcf73f91f32bc0dbcdc63f0ddf37331f6c60c68c16. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZMEQ2395790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6213d8e18010eebbece58af3cad67e8e98df660b85669fed8543abf4117b997. 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/QZTAZ2258168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550496ff7027d202ebc3268d0d753ee3402b717aafca3030c90a8b17fb7af727. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:44:30Z), 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/QZMEQ2395792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c126ba67d9b3e3b6ec3bd5b7470a613aafc270990652a3786d1143aec996809. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:29:59Z), 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/QZTAT2303240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc620a4b00387b07986b7d1064af8d06b16b3f9363e19cdc79a9f91d402b71ec4. 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/QZWFJ2362431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90cdd2eb41a882bd7b806ebd3f07f6302223e8968b933f4a4ee033203b3ec000. 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/QZFZ22482397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f62bb17f003d361f2024b6a77214d397803041a92723affa807dcbf162999f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZDA62437695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e0cd50b86613973afa885a34e751ac077317f81fe0a76eef8d8edaacc96157b. 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/QZES72498850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42da8f715c3e9964c9f2a6f1d1a9b7e6a7d280aea4eca3e39f1138a004aa98af. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZHN32450332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac4335405f42be3097683d94ee25a1ca68430ba6acd6fc32d73a832e16c07d5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN62427946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0420c364d50ef552876e2afe435ce4e5ecd7abc3f0960be5cbec1a01769e09ed. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:02:55Z), 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/QZHN92410056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8741adba3a610bc30195477992512d313892e04fa192d0b4180ce4e11f768b8e. 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/QZHNB2435169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aa49a999afe0db6a61a27c52ebb66b762e73f1529549d5589e6b3af32b6660. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:54Z), 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/QZK6Q2457896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb218ca3882666382b9f13dccbd2135d14a3fd7d4a954a2ff9dcf71be70a714. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:06:42Z), 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/QZK6H2424235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9003e1119bec31b0d1d75ec32a3d624c8fe541d13536889bea76cf337da3d717. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:16:55Z), 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/QZNWQ2472415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff271567f020ed44bd2c0832411b87aae5611c2bfc55a6c38ebe0cd602261034. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBC2488985.