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 0x844a29073f26eafb20c13ddde9e0590067ec925acc9c861f9cca0744ffc003c6. 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/f2eb528d-8727-40e5-a340-442a63e067a9.json and https://artists.proofprofile.net/proofs/artist/f2eb528d-8727-40e5-a340-442a63e067a9.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 0xb2301a28010a2004885026d59df1d3f569de9cb3dc1c208c2f9110c938ae5c3b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCRFG2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a98cd38d3b11133bf787727d59d51f2f101876d3a101c840c34a5cd8a12cce. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/BCRFG2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536a168888ffee1aa2c79a0928e59c1cc6ef6d00f4f2f947798473c75291d81f. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/BCRFG2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0afade6a1913b67d9a5dcb6dfc5b7d2718f4138bf65826d9ecb960db82f55865. Chain 2 (Bitcoin): anchored in block 956775 (2026-07-05T10:41:06Z), 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/BCRFG2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c558b36a31e440a2b09929c5f026a60ae4342d4d878869dc3e0a2677a913890. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BCRFG2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bb7399d243274983b29e76e94058ee4a02cac2f0987ba0c304d3d77285ddb06. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/BCRFG2100014.
Merôta Varitxana e Aldeia Varinawa - Nî,a Nî,a Nî,ani
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a7902d2958a3f5c06452343c512bae7ef0de83165a69fa2e35b500b26c9fad. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/BCRFG2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65c1e1f9536796bb14df1072dd62c13e8ca0e1c1c2751c75b16d2d90f701edd5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCRFG2000007.
Pajé Kaku (Aldeia Kamanawa) - Knaybu Saitî
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afda9020dcf408093750495050692fd4ebdf22183dd0962e18a1d78e67cc30b. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BCRFG2000004.
Merôta Varitxana - Noke Sheni Pavôra (Aldeia Varinawa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc508e9611760fdbd2ae954a7ddf452a64ed6ea15771189bc35d5da601ed7fe6f. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/BCRFG2100024.
Rorá Varinawa - Tsama Wahi Taniki (Aldeia Samaúma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989a1b8f9c365723bdad0734191c955fac5e7bbc5f38610086c0a608d5d60dbd. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCRFG2100006.
Ne,A Noke Koî - Noma Hiii (Aldeia Bananeira)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08698f01d69be073d5ff51ce9c376e95222118ad2d9a4483ffdb76648c1ed9f. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BCRFG2100027.
Paká Chai e Rorá Varinawa - Korai Nono (Aldeia Samaúma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29cdf714627873b062eff2031aff78a8183b72a7183d8790f44b422798b7dbd. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BCRFG2000014.
Paka Chai - Tsoî Hêpîti Kito Kito Tarivi (Aldeia Samaúma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x339cb4de345fd46de2dbd3f1293cfa74eaf47bbb090109245d73164878ace724. 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/BCRFG2100005.
Merôta Varitxana - Nî,a Nî,a Nî,ani (Aldeia Varinawa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a7902d2958a3f5c06452343c512bae7ef0de83165a69fa2e35b500b26c9fad. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/BCRFG2100025.
Paká Chai e Rorá Varinawa - Kawa Howa Kenera (Aldeia Samaúma)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e844c53078dacc8b82db87549614fa3ea37cd3004fd215c04f8a2cff82e4fb8. 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/BCRFG2000013.