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 0xea2d7ee312c1c4ee64ec11521f72184dc7af03dfbba6615681ee9d05f47910a8. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10c03c7d-e3d5-45ad-9d93-91be91655b62.json and https://artists.proofprofile.net/proofs/artist/10c03c7d-e3d5-45ad-9d93-91be91655b62.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 0xa1ee4cf486f29c8f212cd2b561ee923d80df59d0c8dea87d36465de561cb280d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USCGJ0973378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c4d013b4e896dc2cb376f9f337c164286466a95fff4035fb60e8046303fd8e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USCGJ0973379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10d5a63ee9d6ccc1a3f07dcc2b0c8e45abef720ff4742590baa6411568c7cfa. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USCGJ0973380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4216c1506ddf461efd2c71932165f799a70fe3db8a05112d5d43f4b6041f1af8. 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/USCGJ0973383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8659278b5c8a41ce45925c6ea4181aa86ff567dcf426dfc08c9f8d40a35f9a8. 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/PEML11111001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf047846fffe3d409ddb92b4bacd2f98b8aa4141f1b44dccf211055d932a1fdb3. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/PEML11111003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266ffbeea82a3e6e4852f286a552ae696ae6c1178f70f4d62c8b69635a97e97b. 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/PEML11111004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a05fef50d52c2a0fdc5fd7a22c5f0422879ccf7653e34b25832506b720fe7c8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PEML11111005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302cbbcef69a1f0b1369d5a19027abe6d83942a6a3e9c2a1d9d751a11bab7345. 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/PEML11111006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0e33a49d70c8516a8593b5aa590e196d397d400d48575644096dbc8131f417. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/PEML11111007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448ab0cdaf4e0ef5b6e792cd267e23789e7f7d64d53a238f2c4dc0958da9fe12. 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/PEML11111008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfc9edfa8f05bbf3098c044d0bfaf07882e257a577e1d63a305eab5dd0d35942. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PEML11111010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x851fc1e47d2cb6f60b2cbdd3d12c9bd2a3f27103bbb31b910864da50728b01b0. 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/PEML11705115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4162e17e8955569c32281aa213a5ce04719fc03b6abc1c33236ec4914143384. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/PEML11705118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ea635c30a0f93dac7c93d6af6914c66e50052be360911e149d2acc3ebf0f434. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/PEML11705119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23f3d5901613351f303908ea9b3eff1bd543493bf0358c96c48f99712afdab7. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PEML11705120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ba7fd80aeffb0a6125719601267afab82a1ee1b222aaad8875ee505661bd41. 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/PEML11705122.
La Desbarrancada (Maria Tta y El Empujón Brutal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6ce4966b02d14c59e0d153472c9e2e7f78927c434051041ddb7730ebd2bccd. 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/ES71G2011929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e936368be3e2829f7e6e745a5bf6b7728a48539c945c2aab1867ac0e302a83. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/ES71G2304482.
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