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 0x1eaa222e790f5e90a06ad1c782f88049de8b1751c23fe23de8ecfe745210cfed. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91e9b010-652c-4ce9-bfd5-f58649e8297f.json and https://artists.proofprofile.net/proofs/artist/91e9b010-652c-4ce9-bfd5-f58649e8297f.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 0xe0bdef7516ef0907a31e55ecdfdf39b2ab309c05258ca946675406b8b9574735. 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/BCEBC2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd605cbd6b69d78e11ccb5d7eaf1dfe9b7fd9a442b94e96bc2a09028244d269. 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/BCEBC2100013.
Nem Mal Que Sempre Dure, Nem Bem Que Nunca Se Acabe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f2212b690705a28cc4cfb0b2e7b4c9d1fdb82c29295c20ccb76cba07a2db0b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ651030797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ab4cd29bb4e2bdd89833c4a696b4344d67f73ce46d83b6fab199e275cb244d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ651030798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d9b54416f7aa81907bd1c8126730d31f0e5fe090a3f19970149f8f6e71666. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEZ651030800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20e6b8f20c19d45490059100e93ada6f46ddc8c41d61512c078870a8e2a326c1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ651030804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c643e558f77e2e5fd56732e23d65ae8e1aa63e1f7df7a5c21a32fe11ff90982. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEZ651030805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79440e2bea9031eef2df2642e800c89e0f82b3db1dec6f6045e148b8c1649fe4. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEZ651030796.
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 0x7285785f31d6398e4570237bd14caa2a44e888a688e79d5fb592cbb8f3b972c3. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEZ651030802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec44767f65723649603cba5a65c53d760ca9a5ab3672b3208f557c2f4dad149. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/PTOV19900313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ea58b6a7ee3cd4d363b161d9ddc4fdcd683937f88b83745ecb723a9c6ef1d9b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTOV19900318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8c8391168a307d80fd3abdaeab91492b1e3bd0c277ed98cc7d383eff689ca3d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTOV19900320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df09503ba1051d754ca76d92abf03d6baa143109846d3cae6113b32cdfe745c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/PTOV19900314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb0cfb3ad7b4a5a9fed7e830681ca9e7768ad79619036dc044aff39e6bc1051b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/PTOV19700065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34a6af6e5e94d9d31362255f173a32a820d162e59b5ac3fdaa8ba6716f596e5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTOV19700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8b3c79bd50045c3d157dd1e267831103523fcfd0be4c1c22c39130d66de28f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTOV19700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd480acfbb7676d1baf01d5d246a1b1bae8414ed26b1f7ad6f80ebf39cafdf1c1. 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/PTOV19700075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6baf4e01d930dffe30f2034da8d16ef088dc7693aeb3f5422d970e0f1a054043. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/PTOV19700066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1370e1ce636de453874a71c12a919ab67e1af6a9144282e504a44df4b3d1eb. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/PTOV19700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d64164f7c6938a5179d3ee1dfe46828b8225f92ec4c55ddba3953fa4efc4e9. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/PTOV19700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2145b394e96fc3fe13f6ba6833417670093003fceecb3cf5207571c32777e353. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/PTOV19700073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd514d0e9e641e405dc359222e4e44de87823676be840a122eca4bafd35b378c0. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/PTOV19700074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a85bf4431410bb39c42515b2a9ba000baa65adfb61adb7fdee45f5d80ada552. 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/PTOV10600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b69fcf3c37c5916f9bfb663d68e32eb53ab32992f5a8a2ff5c915180d8e410. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PTOV10600234.
Alma Portuguesa - Música Popular Portuguesa
Grupo Coral de Cantares Regionais de Portel
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x168c6e7e14635f5ae988e84e0ab2071064ba4d84905c0d016565fa99e71989da. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PTOV10300172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x387c9f943af65b0a20bdb05bed57bf29608015e253697a479ce30644811b4809. 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/PTOV19500137.