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 0x5261e580943f8632b1ada5a192b5155d8616a2f689866253ae233fa41ca4e34e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c2992364-c2f3-4ca9-8f25-6ebdfcff0387.json and https://artists.proofprofile.net/proofs/artist/c2992364-c2f3-4ca9-8f25-6ebdfcff0387.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 0xfcd48f3a021e0eb92eaa2f60a57e76537725ae7aadbe205c65dbb508e9b3f192. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZW9M2240981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4aee9f0d4da293073def27f24ce75ead19e6edc1f0957712739ab5f49a158eda. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/QZW9M2240983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22fc4b587b874f4d472d9a6d3939a44b6903bf20aedcabb4b3256e226f7be0. 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/QZW9M2240985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf883c7ac486386ea5809a549146d2afce7fe0597f23399537432b815917f717. 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/QZW9M2240987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1afb1379f75f0d14109f2325741fb865d78d65f81664399fa6fa1363798251e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:26:23Z), 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/QZW9M2240988.
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 0x80876c6b5a5cb3a0b2399d9fe1b7ab69f9b6d14e26f8241b61a4eb768bd0e4d1. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/QZW9M2240982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaada9890605fb1b68f0d137b7ba39bdfc406665be37b058af36aa79fbbdffcfd. 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/QZW9M2240984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc676d995cbf64a184a004f85b2293b840a0a645e65371ace6979f5d95a817f8. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/QZW9M2240986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3883a80e3aa8893cbaaf0fcc3f205c7f40fb1e41bb6b5d0fe01c6432cf6454ba. 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/QZW9M2240989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df0c1ddf2b7fef02fcd4d4f0673fa4a8422456800f3298f0b8960650ec1e79. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/QZW9M2240990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f3674a90511131b771b90530d07cf85d91a24d015b6a43669aedf08818d22a. 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/QZW9M2240991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9130cc223265638ca051ba65d914e7ad9762ae2419471e72887861da7a9cc924. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZW9M2240992.
Playero 41: Past Present & Future, Pt. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84bb7589e0fbad81c29a8dc9993dcaee9885fe7ceec518100c6bdec36717ffc. 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/USDHM1004444.
Playero Dj Presenta Exitos '95 / 17Th Anniversary (Underground Reggaeton Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d314711cf3ba316c7a63e3ba9aa8e03df2f6a204e65c2e1e960edcc926d36b. 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/USDHM1206311.
Playero Greatest Hits Street Mix, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cf9405d41ac7c95d574bacab7be8fffd9437d9d67228436c5126f117b6f6327. 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/USDHM1102790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5165ae43a363cf75a5c851d5c072e579d3d9ad7c2dbe6f9ab9cea2d8dd319ec4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZGLS2286845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f088c0915e538869b79c4648f343935d66b3356b2318104e8fc10282521309d. 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/USDHM1108807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0881f49220ed65a8b0fae7eef67cde7f13fa4464b49bf2851a6f2a054ff22e1d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/USDHM1102763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02c85e20a608a297e412fea71f5dec070db979291d632b7a942700faffdbad1. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USDHM1102776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff94966cc5a694b9c32630727a7c746954b206519675e6abb1a6eb2e5317989. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZGLM2266158.