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 0xd4d9d53b7267f43ebe47ce9020c5a2201ee07d2d8829781bcad79c78341f5854. 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/a9da5a8e-9fbe-49f3-9a67-067e73f3f8d7.json and https://artists.proofprofile.net/proofs/artist/a9da5a8e-9fbe-49f3-9a67-067e73f3f8d7.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 0x2ee68654c870399452bd2d74b8f3c39532d99612a002d2b7bf64964c38e9a735. 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/TCADX1823607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a31c6f77973391afbe65e055be937ae3028e04b38bcbc890882d80d54f059ee. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZHN81914060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd3c3a6452da3a138d71d0571f42a21f639a7c37555d0b2cd47aa719c62240b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHDH2000019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417492f642ba95305520f05114b193ce8a1bb752ad8ccb795dcc6b097e7bba1d. 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/UKACT2131864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a15afde59f25ddf7ce8fec27296a68fef5f639fe5d5407af35f1e03d1c61322. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZFZ22284223.
Encuentro Surrealista (StrangeStrains Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4cb1a8401cef78755dd8549f1360c0aee5791f8a74c43aab77c7485beb0faa3. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZTV32417876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc76f3dc1dc46956bae2ba755677fd92912a13877df3b7a9a9d852bf9903d4c47. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZTV32418048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe028ae069d9f01a776f93ed2afe398e68c2208c63ad2d02b152708898033cb. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USA2B2402569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1639890cf31dfa7505a54d6dcec987fd1449e77e8b2d1386be1122fda1c9837a. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/USA2B2402570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea554742f06f99d2aee85c2afefcf7f582d87fd9b0d8ad2aed7119d0826e597. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/USA2B2402572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62cbc93144677cb8b96b8c0adcd86bd44d68711f2444fbb4fab5a0e16d8da2c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/USA2B2402574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705e3e1403021533c2399152fac3413c7e509dff2adeef899d540296db9b6ce. 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/USA2B2402575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d48e894d655ff1e565f0db809289a0841ecfa0f9225eed4c488d57c8b488a4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:48:58Z), 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/QZZ8B2499088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e616c8a33228b8b85a990ce6dfc67fd7f1024f8b2c937d7cb47a7a0d4e38b65. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/USLZJ2566308.
Nadie se salva solo (Música por la Patagonia Argentina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe33ca515a2f7700c154774954f3ec3562fbf4f7d2da664ff46bcd4ea15fdf69b. 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/GBMA22526148.