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 0x646045231b39c2f86188e53ddd89e703235fa4e3d9da66ac5c9909e0c4cf7844. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d75b9ed4-bc19-4aab-89a8-e91ce29b8d5d.json and https://artists.proofprofile.net/proofs/artist/d75b9ed4-bc19-4aab-89a8-e91ce29b8d5d.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 0x6a28d9e4db60dcb87d71d8fe76a75bf57e72421a9ecb9469e13df2d6ce8c49ee. 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/EEBN31800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4b839061a0737e8847b3488e5da11699ad0f4063ccc3bd065d0fb407c3bc7e. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/TCAEW2008182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a4bc1544c4a3431d045c0df245412b81a15f381cd973ce1d4fc1e22312fac4. 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/QZTB22266354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb39ab0b0aef56e9ea94f77b005addd553a76a8c51c3d2dc8eed7380cf5cbc8. 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/QZK6J2375703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977621ddec5a3ebf855ccd3113e6100daa6518baa2acb6d9ce90b28b8d757094. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZWFQ2317485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe059f8c483ab6f0347e860026d1d0f3ca33c05c14e86e7b58d26994d6dc80a38. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:16:30Z), 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/QZK6F2440225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd590d366630b1ec6a72ab0ef573a867b55a1e435e5b8d40d11def7ad0571ddf6. 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/QZTAX2440082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4b892ba5ad6d3e8c3810e84653faa2a25e7b32bb8feb9ee0189ab71b452425. 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/QZWFS2486439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d993ea92f8f28936f2c79e59655495c3feb49eef962471950936f9d09bcd1f. 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/QZFZ32523670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f840a5f637fdaf81f7a7bcff51bc7df28a1447fcbc9dfa908727db66554740. 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/QZHNA2516098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d259294f11c15cb22959310fdebe271acd39b9e04adba709161c4885a69ba0. 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/QZK6F2508962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21d993ea92f8f28936f2c79e59655495c3feb49eef962471950936f9d09bcd1f. 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/QZFZ32523670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa26e102d4360f045e5250af659ead53cf897491508a2189f4835a8d32d4c3e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6F2508963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4d21bcecfe7b765646697a28ca516eea62ea19eacba1a427f9caedbbbaf239. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QZK6F2508964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc535812c0a737c2a40a209aed0735f507e389e699bc4510dce256e16b1a1640d. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T18:50:24Z), 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/QZK6F2508965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4de32577bce8ae13834397c2d792c31abf60063057c883d077e17742355aa9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6F2508966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76596d82b0d6c1be158d81e648366640fd0ffd2c085bc868819bf79641cab8f. 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/QZK6F2508967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d4f06bc33efc348349d7585a48e6a8c7afe72a4c97136443fcf361f55caf61. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZK6F2508968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f840a5f637fdaf81f7a7bcff51bc7df28a1447fcbc9dfa908727db66554740. 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/QZHNA2516098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4aed1bb6e3f6b311b6c6f16573efbf026946f7e3ff426a902a8ee1d468376ca. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:59:45Z), 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/QZK6F2508969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6bd8a288eeed11de33d5c8e6f4c8f43a999007ad1004f776ebc94a4f058f000. 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/QZK6F2508970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e54e34db43b3b3f04a0067ae6a5765738fa47d6fecdd2228e6fe276c7a72a7f. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/QZK6F2508971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168e4bad7553146d7fb6897c8e0cef77833ed76aebfaa80f890ad0273ce0cba4. 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/QZK6F2508972.