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 0x4e7c76b798f1ae0597f3826e5501242626dd81472963b16faa87e8ebbe8893bb. 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/c8f9d595-fbbe-4118-9a4c-e2abd903822d.json and https://artists.proofprofile.net/proofs/artist/c8f9d595-fbbe-4118-9a4c-e2abd903822d.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 0xc656cc499c80a9c537ea794ad25c995e7937f4713e0658b29d69b236e6043b28. 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/BRXB02300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e1c2a849cc66a776f6f4614dd8b27426fac735ddfb5d823aa6ca21d4a347e00. 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/BRXB02300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a4b3248af78f387a4d735fb299db6919fb1f2a2da1697b6c7bce2b80083ef96. 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/QZGLM2355289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f83db8398641451eb3bb2898f96e7fec79e557c5de097ee46f1c6fce4877ff0. 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/BRXB02300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87240306c11d8e8c53d4e86b2c88d18cd02f2665433dcb6334860466e0ef8d3. 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/QZGLM2355290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee39bb55e99fe55b580b98dbacb022e873d2fd3059ccbb40a11fd7427936683c. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZGLM2355291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d95482bb37d0bf7a58d73556da7b7524d98ee011d496d5e14d2c1686e0c486. 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/QZGLM2355292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a716a29894467bb3f9f4a8648ce2d8dad9d9c3944419222cb2f009461c2356. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/BRXB02300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9109861160e8eef9bba12a5978a705d96957350aebc96bd59a397610519a5505. 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/BRXB02300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab04c9bb57f98228d9500d844fa415e7f10a7da234789f3cdf24a2755a54829f. 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/BRXB02300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b78ebce15efed085373a53dd66c24aaa9d4205dcfb13a77ba3a38559b1c1c43. 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/BRXB02300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520099ae420c042f5c15a20b2ffaf3b10fa86f151bfde90cc723ea4ead79ecbf. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/BRXB02300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f8afb44b46cdd9de5768aefb4e0b28c4b53156be243115385651029f87a9b5. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BRXB02300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa43ccabe2adc8db15fb0a75f3650de822a5ee55467e7ea74c0cc428d6a02f4. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZGLM2355293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016ebf2b4a50a35ccb7762cad44edf046857e49567e120e4a92e293d76c2e792. Chain 2 (Bitcoin): anchored in block 957039 (2026-07-07T12:58:18Z), 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/QZGLM2355294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ac0772f5d3fc6c00a13df266103253dbf5644a4ed98df2177712e33d1229ea1. 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/BRXB02300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a690b59891d7dc82ec477b2a6c123f00f61781a18d96fa2c4d7ef871834ef2. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRXB02300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4967ece98262d2b39c6f0719c67b9a2bce101437fd499f4cc2b23961c45db095. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/BRXB02300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21a59bcb6b3e765261619300198ccb487d4097c972c639f0f3597a74e8df6ed8. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BRXB02300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e64edd9e18bbfbdb05684f68c9c4fa5a03b9ea3d8093fff967d6cecbd457ea9. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRXB02300012.