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 0x9b95627eda26d650924b9903e5cd8752ec5ebc4e62cc5035550ae14baf80a813. 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/7e5b1049-486d-40f3-84b0-884cd986510b.json and https://artists.proofprofile.net/proofs/artist/7e5b1049-486d-40f3-84b0-884cd986510b.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 0x0518d326b420740dccffea3d29a95bcfb37723025d3fdf9476f5282d378d0fcd. 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/QZTPX2355784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c703635ac22f31ad415e4f52546357367b7c6dac206ed22af893f30aa3f816. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/USCGH2214807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dad9defb68d4e440644c6e9754c5ec93e3d6f43b23502c77eabf6f4f4c80693. 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/QZTAY2305314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67e641683a024ebe20d5b302c1ed4be5dc8949b0074d10ac21fee5bd83f2f1c. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/QZTAY2305315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9691f1efe3a3a2e0c96bc808602a394f7de97f3a33b79ccf43c88973fcd571ef. 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/QZTAY2305316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71476eeb7393f136b0aa67b210c6e020baed7440f774c12ec5aaaef534b8328. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZTAY2305319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf73c1065685c4527282ea4394aad709b64028f0d245e30f111f701d43ee852d7. 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/USL4R2121282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f286f2a2541d90aa121f07215d79c0be589a16f36bf3bb14f65374121794fb. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZTAY2305320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c703635ac22f31ad415e4f52546357367b7c6dac206ed22af893f30aa3f816. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGH2214807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14b81590068cbe9d3d432a7360f2e97984414d0af6072f490e38d98a27f1eeb. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZNJW2455385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f12300f0c8f0b193d20e65d9ddeb67271d900639833735680304f5be0c299b. 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/QZNJW2455386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3879a0bf59791163afb0f07fa6c0168d85ea3e7e0882658a0175c0a0f86c60b8. 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/QZNJW2455387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24dde2c96007c039627ee499a24fb1d8cc379dc6a94ebc002648dd38f393aa61. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZNJW2455388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3476f05bf4bfe9561d1ad832be29df0474b77e31933520ee49aa407e61ccae. 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/QZNJW2455389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe245214ac0c43193c0f4153ed4181f3b8f298d5db71656eed485838452c87e47. 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/QZNJW2455390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb911730b3a444d5fcdba684476acc4e65e9680df38a279c3d0fa4083c36f8d. 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/QZNJW2455391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9651479d3061e2adda331fd1e8ff730fddc0d140ec0795bcb6c7224c0b61ffed. 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/QZNJW2455392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc887405cb2278a97c3be109a8816087a2dfb93941d56f336f19709649fe3efb. 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/QZNJW2455393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155625bb00dff350a2dbe313480457f05e974a20fa017a924528e0286f2874ef. 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/QZNJW2455394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7465051c36f90ea882eab57d6628a248f1432b20156625780ffd57c641e2d2. 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/QZMZ92332149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bdd4ec21559f7dfdfec7aee1977b3e6edb598e50b8ac2f21c4e8ed6ba522ebd. 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/QZMZ92332150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2560c1664ea866110a40ff47208606b5109a13fa940423d036a805ba50470966. 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/QZMZ92332151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d0940fad11ac0ec4a2200e51d50e7fa78396951b13af2ccc1616fd01109724. 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/QZMZ92332152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20548b8fae5d4332eff10d0efc7f142b99261ab867d543a2ceadc6f9f4073972. 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/QZMZ92332153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d68032d1762d96b778f60286183f3b8cdc138c95e361ec89a10e59c7ab761b. 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/QZMZ92332154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81b37096f839e53e6454413a64fc83bb3756b465be0067193e34efb52dddbad. 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/QZMZ92332155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae5b27aec909a8b348567d5188842b50d2d1dc0e60a89e66215a33bb01f524c. 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/QZMZ92332156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d55bc0180fef64110c957602b7c874fcfa8845025fc877c3e609d9059c427e1. 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/QZMZ92332157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be27475e01996b7fb24db2e11585b4d4269b8ba6206e532d10acc28976bd302. 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/QZMZ92332158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0025920e66f98afa918f4b15a429363097ed26f45bce555b2772a68c246c8066. 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/QZMZ92332159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe8491894004a735bb51c23186c782d78a4d6bb5ea52a60c297105793596efae. 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/QZMZ92394188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f3dd6dd2deaa40733ebb052d6e47f7770b24243ab0d3d07bb2d5e477c28673. 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/QZGLS2382666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d2a6a9c935bb431700e75635a6b56764f7ab699c46ca92b3e9831844d41ca91. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/DEQ022010382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61146e48a87bc0b4095acb55ad32faf3fdec60dfba44ad1164302ff62f13045. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZTB52236515.