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 0x9af1d15d4693865cd8d56ceeb627966b6d118f86f887a5eebe00e3ec39fda0c6. 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/a74a028f-7de6-4c6e-b05d-372fdd887d74.json and https://artists.proofprofile.net/proofs/artist/a74a028f-7de6-4c6e-b05d-372fdd887d74.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 0x9f608283b847a4613c5111549bd718948c2515d48a3123ea81534187a5311d6f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DELJ81931793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd69a98e1c0b305fa0b0672c255f1b06efd1be2144211ff5c67e25254b823c1. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/FR10S2071961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e5e30939d2bcb6ffbd7f46ac03daa55ca9d9bb421fca407bcc4050d45b13af. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/FR10S2071964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298e0b46a44aad4deef26e72b3bfdcbaa8fabf14ea3c82407521b821f72277cd. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/FR10S2071966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47a0d938d8fce1896e0832dcd0bb05deaa0a2ab7c682f6e2e7d64393f9d03e8c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/FR10S2071967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501137a06d8f989f1ff61a909ca4cd5cda039519f7bef44d1d8b4fcaeb46e842. 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/FRX202148222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c964b65e36a73c3ac25b40ea4791918196adaa4aef9af45bdd5ac77e2d74570. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/FR2X42208020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93307711a50e703b1f02e22ad1af0b2dc0e6e956e14aad39953ddab8880d0d94. 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/FRS182099479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x501137a06d8f989f1ff61a909ca4cd5cda039519f7bef44d1d8b4fcaeb46e842. 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/FRX202148222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84ce1cd58f4b7895a32b4adfb12932c579b5eaa54dc7f7eb2b172f1c3b2c6d16. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/FRX452194016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a9c07db8560019e6ccadacd257f1d999b8ccffc003d0929f26826518d34a5b. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/FR10S2216121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x724012aeb89c29e23e02f58a2582d5ee5b43a451965cfcba1e6028130fceec73. 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/FR59R2223624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7a865be6c6a62b2706a3b5da21ec15a9b3d5a96eaf3d2b82c1ad84e9e8eb26. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEAL32300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cc1cbff1c4e95c9544e2bf7fb69c49f9cc1770e69e46f46015705725ead21. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/DEAL32300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809cc1cbff1c4e95c9544e2bf7fb69c49f9cc1770e69e46f46015705725ead21. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEAL32300098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020b33af0cd3629f24a99887f295f724da974bf95d75ddd8859d3c870c23ee43. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEAL32300150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829d474209efcbd6cf4c1e0a80f8e1a239eac61955975c2e6f60fc24e44e2a92. 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/DELJ81809633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8492dc5199365cff30d19327534e0d64aae63489477457dc18bff3f50124760. 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/PLF241906648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a975a6dfb474fd53829d44c26fe65e08cf90d9caf88815c5835efd5248ebb. 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/FR96X2229785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed55838a03046dcc67a047eaa5a24d8aee410459ba8a34c1733158c8794ad0. 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/FR59R2250143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e9fe9b3f7322c70cc258bc8f56d8ca9b1796978a2e420058c03edbc262d2a4. 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/FR96X2292208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fc336a54a7f4400dd744c13477fcca97a3325a186c4f5d421946906dd7c1bb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR96X2292209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f54c41dec78fc9b8c4fdc25bd66cd19f65117279adcf054e9dc0731ceb5db6e. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/FR96X2292210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0bbe33e7aa76dc22ba1c11410827447c7094ea290ccf4e7b55586242e4b742a. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/FR96X2292211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8859cb1bd3a2d32e2b63c15c49c007ab47d8f4dba830fd09b26476aa343b5a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/FR96X2292212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8368f216966d6c93c86fc1bc60317fcdd34d4e64b1326aec8d6784a521bae2ab. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/DELJ82039721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e8a975a6dfb474fd53829d44c26fe65e08cf90d9caf88815c5835efd5248ebb. 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/FR96X2229785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eed55838a03046dcc67a047eaa5a24d8aee410459ba8a34c1733158c8794ad0. 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/FR59R2250143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8368f216966d6c93c86fc1bc60317fcdd34d4e64b1326aec8d6784a521bae2ab. 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/DELJ82039721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc05f85b065671eed7d2f3584ee9ce7a6b3af8ab2720c1629fa551465454e7060. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/CH7812238538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f55f077195d90c5051d8ec7ff9fdd389365035c06a18c1353bf9a2f4015c494. 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/FR2X42278924.