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 0xdafe6d8acfdddab2a9992848e5b6b7898a87183a8731a18d1e9484439cbefc95. 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/e9793a9f-5f6c-4adc-b08d-3841b5f9ea33.json and https://artists.proofprofile.net/proofs/artist/e9793a9f-5f6c-4adc-b08d-3841b5f9ea33.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 0xb2a01f3dcda25c31ff1093c8c969af40cb9f4abc7a8fd91e96d4253234611c9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZ5AB1805767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346834ae1ed4f98b994ca659f1a7247f926e337cc0d54f0a723d6c7f7f02476. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BCSUV2400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f488c0fab0daf3300ad7d9e39573c78bee68dee804ce8feb4ab98d95b96683. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BCSUV2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c20e9e39a81b3880976d69d17b30b09d6af733166ef3b6e83f92973c09408. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BCSUV2400128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be125447e9473474b1fbdf4727970f9d866f9a213d166988a130572d444de03. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BCSUV2400129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc08db91e9cbab679e4c7548b2be923020018a718fb6d29dccaf96232fcfc4d. 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/BCSUV2400130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfade1ca3ed39aa65f608413dacab312c3992d29bc9957d1fa0517ffa2c43b1d5. 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/ILTON2302433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba0070196dc0b5c1a63238beeae1ee2dc9b9ebc15f9e8b11b25defebc5a785b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BCAPW2300113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bac41c04cb3edec82e8f56cc11b4262ff28a2a9506d965032c6aba4cc5fb97b. 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/BCAPW2300100.
Lábios Divididos / Diga Sim Pra Mim / Louca
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc22081df6593df506b9c2466f04e1e8636a2149c59d931d882789a9982609d46. 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/BCAPW2300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0a7fbc47ef4edfb216084778c23a4334e75c5556ea78d39ac33431b4931e61. 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/BCAPW2300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0daa10f1ebc6aaf1e31990c829eba9b9f910a980d41666f7a782ab3dec1ee166. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BCAPW2300030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95dd1cda2fabaedf7df6a5cdb2721b6b01bc284d1c219cebab31090145a185c7. 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/BCAMW2100129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9411c41b75fe476c7373712d3065a2384c7261eda413260f51d1174be648dc. 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/BCAPW2300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x662e093241afde5f26b4fb1bf88b7aefdc56f00886673b7cd3524c189703e605. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BCDHP2200217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55cda87c8e20792930020c5df22c25ccbc99268090099d9ff34532a758481f2e. 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/BCDHP2200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19feaa023ed1f0610d42ebcfb3f32264c44817b73471a2debdec42f43604808. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCDHP2200196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254dcb795b6b29fa3ae9f492e9b8ea15edf45284c0962daf9912c965b36c70fd. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/BXLWP1900134.