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 0x3e29683883a722cf26d16b23d601c2d2a1951790ef0d0a2094e41a79dee20aa0. Chain 2 (Bitcoin): anchored in block 953598 (2026-06-14T06:40:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0d667ff3-3e86-4f94-8e57-b411da78f46f.json and https://artists.proofprofile.net/proofs/artist/0d667ff3-3e86-4f94-8e57-b411da78f46f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Alfama Suite: VII. Dance of the boys and girls who fill the square (Arr. A. Cassuto)
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 0x84e026f86add71be1438532a0115d449a3c5b239053400d1a8d9c8433d85d17e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/HKI191116209.
Obras-primas da música clássica portuguesa
Sinfonia (subjetiva): I. Sulla Violenza, Motto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c47da24aba9be6a67782e87421428feca88496dd6c0f0a5291f9523b589bddc. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/PT5TJ2300129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588562106ff2b1b812192b4fa81f0840148c96f83445356d8db4613a8304f7c4. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PTIP10900215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedaca2beb4bc19dddd87177c3aac62b398464cf984ac947a394e165fab3e00a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PTIP10900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085d4bf33038cf0f103f3ca8e0180ac51343b5b88c23514e2e666b88ad7b31ae. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/PTIP10900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe294bcd615addf7c2b2b5f208b40c4fb9e35d2345f362c55cbbbfbdcfdb85a20. 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/PTIP10900181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c50421e7cb3167bee301cd19288cd18d34eef367943dacccc859c56816befd. 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/PTIP10900182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408f5d78585b96f42182380526a45e42b6967889a70d43c85f83891f83488506. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/PTIP10900193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347e2c57070c4f7959cac0d274699655490c4cd1330de4bbaae6cf98bc84a64c. 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/PTIP10900183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f72115953490a5375043fa6a0b6b4b35cc3b9eb29f157799f830b5223cb6f9. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PTIP10900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe756ebd9e043fe62b9af532d50fbb31c475f07d05bbb4e58052d02dfe0dc342e. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PTIP10900184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc041fb3dd6f1c9a75198e4ace8f6ac335506ac85fe7635731a6c4eb387e96cd2. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PTIP10900185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b292e25e076f919bfe9a79ac72a64f6e8f9a015a83f30d9db5978d63ebf3489. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/PTIP10900196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1be7a38127a05d09b2408505aedff22fb75cfbdc0b28bc41925e61690de7241. 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/PTIP10900197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a6455bb571308b607461d5df0df8f17922279fa3d73b8e6cb21f066d8719d73. 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/PTIP10900187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2add11a090ab8e27e3717cf1d37f0854f9ca141c809ae52c13e9ddc3b2f5839c. 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/PTIP10900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065ddd78dd18e493b34755ddc389d4a1bcff2624636a7694751d07bfb396a952. 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/PTIP10900201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1053db507321c12fb5135f1530ccf51ba310195ea3fb480ed7745496d23a5336. 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/PTEM19500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118e3e26584d94e397d8ce6ab1647e9bc41b83e54012ec063f0eaaaa7af95ee6. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/PTVC11200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68a436b9da009761b5447e4c99e7f179c06546bd6dbc7774a0ae9914434400c7. 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/PTVC11200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8684ede52a97f401e3938e38e11d126566a699d5514db9ba5ccb401162ce3071. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/PTVC11200030.
Light - Distance: Portuguese Wind Quintets
Contemporary Portuguese Chamber Music, Pinho Vargas, Oliveira, Delgado, Tinoco, Rodrigues
Música Contemporânea Portuguesa para Guitarra