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 0x60b96dd775633fc67afdf9f5fdf19067bc7b2e30e3cd7ef0c0db6e574d9cf64a. 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/e9f863af-89e5-4240-8d6a-3299a0fa9742.json and https://artists.proofprofile.net/proofs/artist/e9f863af-89e5-4240-8d6a-3299a0fa9742.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 0x8e7422401ef46528b7aa6971a5f3b5035ff3bfb5063a4aed1ffb7c09bc6c566e. 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/TCAEK1960542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7645ad4f567f0105cb723cf61a2e8db53c180120a98a6eb2593717b03705f47e. 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/TCAEK1960544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x106117a26fd989b2a92a7cbbff925fe4225261a120ef70a0f178f14c30e9f996. 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/SKE741300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaba4d03e520442b89158eaba4ab39bd3b613e061e5a0a15a4d559a67f4891cc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKE741300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fa14a08b0808d576bd556855b0bd8e72cc282d6e55fe993298e64e51266b3f2. 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/SKE741300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4fda8c9470d349ccc1312460db292c9d33ba07f67b78a8e669f430c45ccf9c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKE741300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f6ca21604ae6bf2f0f88263fbfd2ce8a538fa6dd42639ee861946e429247a6. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SKE741300309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0717b22400f17342f76a6622425701cdf4dfd55550374f64001e3c4526496475. 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/SKE741300310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18c806ffbd387566b358d443e126ab6d8db6a03bdc7c009071820179463e5d5. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SKE741300311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7920bc49ddbc7eba9b98ee73b977786e12b2985839b0a2b8d6c2788a9825e8d8. 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/SKE741300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x948c52b4e8939f2a7172e02726b118fab2e831e776b6e51038560ac240ce5ac5. 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/SKE741300316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfcaa29ac2c0842ae70815fa83060f542a70f0561ca9b288ebb2dae61c336313. 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/SKE741300319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff5be268946c0e6fd38d28d2e59b5ba225739ca63c64d74108b893636feffc9. 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/SKE741300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a7052d1d83107081db3f9babad1a5cec92bf0c97ff7d917797a746d5c1d75e. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:00:30Z), 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/USDY41765525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6837367e0585e0011b67d8970b2a2c34059c4fbe2b644c94154730887c2ff7da. 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/QZWDW2218449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99809a8648c4335b022e582e2de28a462a4027dd6ae669b8499355a8133e95a. 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/QZWDW2218450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26224405e66e4fbe46b5e784db880a6da75392dab577cb02df3bb18b1dc946d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-22T05:26:52Z), 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/QZWDW2218451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00bdd8e447b9a58d8b266400cd6083656aba84aad357a9d12635c969b8c5cf34. 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/QZWDW2218452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ae32f82c4fbcb55d911bca5aa62784a46e736a06cf8984554a8c34026e97b. 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/QZN882296099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e1d02353bc151ec97444965957677a43f2e598a137db5dd1dfa6fad6cf332b. 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/QZWDW2218453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb567a495c8965cbe4b70f36fa0787d5f926e414fc9de9406b56b8439d2ccd2f4. 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/QZWDW2218454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0f633c858b3a51f717c6315e0677d09530bad27e09a6583994524a4a6c637e7. 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/QZWDW2218455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aacf867de63f2832b5dff978fa008b3d578690e2ee99c52c80ebcd5fda28a72. 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/QZWDW2218457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901721cd329f8cd5785965df9b3abcd8faec638fcd11508d388bc6eec708f43a. 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/QZWDW2218458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bdde4d6e57de1ea0326b2b3ec6e5703d9decc43670f5c3c9e7d1dac7886786c. 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/QZWDW2218459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7a799e5aac10bff0eef867719b6b16453019ef9fd3a57f42a03f09811f119f. 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/QZWDW2218460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501e15a5a6e28f6a7f2d94b56ae9bd76df8bdae23e0c2c5cdc2a1f059991214a. 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/QZWDW2218462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf65f6de72f4823c83796dada48afa08533737bac0c427938f5aa202f7c24dfe. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZWDW2218456.
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 0x074162b7aac7a6d0c5f5d0443c6757b88db0efbb61a17d977c9a0f9709874ceb. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZWDW2218461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x036a52303544d5560128bf516b2dfc708fe634ba0572f202401275dca03ed71a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZN882597166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d23502eb60d6340590dd119adb33ef4b7832d49133392fc4b2b42acd487d8f5. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZN882597168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a3da0795f4a2929624a0fe1e913b54d92a20ce602d6d22dbf5cac61cc1921c. 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/QZYFZ2479055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d7abfcfc0cc882ef82eb764954255c859cdb36fd6e305e095fd607f08673ec. 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/QZYFZ2402223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04fcc5dd9c26011a7cc5c35f3f743fe59415af5e60d5fae9df07c24ff1bae63. 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/SKB841401440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e7ce92c6e73563e5d19622dae745f899fff94645029756ef0ed4929a9af15e. 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/FR2X42232917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71113c68fd9495ed96acc98863dc5978ab47e3aa750e91c90192a875b0bb74f. 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/QZWDW2411032.