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 0xd3ef2fc63bc6609e246555797c87400bfd1c33355634189cd6868fad7002beda. 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/fac08d5f-a9a1-4afc-b922-b2e01e33a42a.json and https://artists.proofprofile.net/proofs/artist/fac08d5f-a9a1-4afc-b922-b2e01e33a42a.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 0x95899a20ccf6943c1e0cd8353408c01a2578a78033e709cc18191bc9ad6c9b73. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZDA62041548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b6ee2d1bb0b7af358d9766af1ea31e2585e9a2d0fa0056e080bb03572684c9. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZDA62041549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78df44cbb93d4b3c1c6809bed6fefa851a90908ddc8fbb95492513e39a1f990b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA62041550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6cd1c22fa36927e35e4baff145a494ae7560b5bae765ac28a8f6ffda75d24c5. 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/QZDA62041556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d94e3b6677f218ad18f5011f0c3735713ca408ecc1851c8c4442a0a33f80b99. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZDA62041585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f66872079d912ce1788e7cde231a0df633b62be2bf6f6dba5bf8ba658109e5. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/QZDA62041588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1429602781e573e4c629605086b9c08149f57bca165fd17797e6b2f61fcba2a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZDA62041589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x781caa489a990e544de2a355699589793620469f9e7c4f5ea5a649bfaeabbdbf. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZDA62041590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x011c8fc624020c56c25e4421f076125b9ac8a5b75c1844494f04af9738c74990. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZDA62041592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448deacd610c20a86a6861c0dc81dfc4ac58035fcabccac35a54f4972d1b7a6f. 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/QZDA62041558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058a6ae7a59e58051428b1bd90c7a56ea07a39f8b50260119ec7d74f8c906411. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZDA62041560.
Samoa Matalasi (Lo'u alofa i la'u Samoa matalasi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c3745bf6c9e1c40e77fde6ec792b18acf8ea5b8c7e4d6992e21a878783483a. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZDA62041561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea54f4d315f1372b1210f800b1e9973d8b30a5e898c8b4c0ed81101712fac9d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/QZDA62041583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d958a5eb3884f92fd0e20e74f112fd6a10f4377c6998b27371f54ad9b5762c. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZDA62041584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c1b8a261a537f1e93bd0111256139dc516cecb2bf563f661083c81661efa7aa. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZDA62041572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09c579aadb7132ca0ab289d5123002955755df03e09b13f8ee0e344a4fcf3e22. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZES62045157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03bf130194a516f20d1960fa9041e8d89facd5a23c03e6e68ee688dddb0dbb77. 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/QZES62045189.