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 0x8f6078918d0b0dc32f7dd667c8d7fddae1784e03864629eb1afdee7d6d5f875a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/601a61e6-ba13-4aef-be40-9db85edfe567.json and https://artists.proofprofile.net/proofs/artist/601a61e6-ba13-4aef-be40-9db85edfe567.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 0xad92324d4eefbfa3f4500756128647cb57b3f6d5969eccd3075b3e8128598fa1. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM92015233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2d0ace9f55d37c13eb826ba50f1a2eb0ce8106bc4ffa36669a24213da8080e. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/USHM92015236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c8402b314d6eabbb7f4751a6940e5630c36ae5c32cd0011e9e7d6652baf57a8. 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/USHM92015243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4947324287fbfff001b853cb984381922c49bd7fe00059d4acde1342e81286. 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/USCGJ2257534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a03184cedd4d186c16402088252e1574bfd4f5af2eef89b5562595ce3d994a7. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/USCGJ2257536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52332d91974b56d3b9f8c99a3ddd85dfcb6341ad421845495fc7cb0620136504. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/USCGJ2257538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131692018d5e5fec2156cc8bb0979f9580260816ef51aa033438b6108124d407. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/USCGJ2257540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c98e4507fd352789e5b147511c24573cec402be93a4d04ce63ff43d6829ef3. 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/USCGJ2257541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696b6479317c6de18174ff4200033081ebf4e56431b5b5772285d100b9f15dae. 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/USCGJ2257542.
Corazón de Ceibo: Homenaje a Fatiga Reynoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd75bb36561a2232f3e74ee273238ef7a95cb50d2db3e69c995ffc2a5ada7deaf. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/ARG601900177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42a2979616a631b97234cca920fee8f15aabd15a8b329609dd6538c094024937. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR4MK1900144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4264b46a01cb93dd385d18d57050601a17174a2a653fcc31e833044a2e7d209. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/AR4MK1900157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x699fe338505f56cdfde2cafc2748cdad554e66dbe64f80eb492644c271d1546e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/AR9VI2100118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50797f1c6decafa85e50d554f6fdb5736fb83facfe64d5a3eb6394728c30c558. 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/AR9VI2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7118daee8d958840a14fd4d6248b8c2b0956dd3d25a3c27dc456c4a7f7e78bb1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USMH92364165.
Enganchado de Chacareras Pal' Asado y Con Amigos
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dc441d6f208b544d3f91f9f63477d49df5587fec5b065604fe16a1b29f4ecae. 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/USL4Q2421161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4652a61165239c407c060efdbe8242ec4e7e6309442920caab868fdba7e144a3. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), 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/USL4Q2445469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4613f3433a8410e2ad39459b0ef6d3d7dab71cca87eba48205fd78df7f82ef50. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USX9P2527743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dd1bf2f34508c7ee9174ddaed9c846d65c9239827c39ba2518b97b28cb48f3b. 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/ARG601400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f583cb16b0e3bd56777540c8d64707486baa6820e178a8e0318f1d57ea623. 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/USDY42130356.