Nu or NU may refer to: Arts and entertainment Music Nu metal, a heavy metal fusion genre Nu jazz, a jazz fusion genre Nu-disco, a genre of dance music Nu gaze, a derivative form of shoegaze and a
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 0x1363ecb775252ca864924f98800218cec9f7c995ce8c947f7e2a5d24c00905f9. 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/840fe9d0-08c8-45e2-aba5-5eadfd2dc485.json and https://artists.proofprofile.net/proofs/artist/840fe9d0-08c8-45e2-aba5-5eadfd2dc485.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 0x1deace20c37ac2f53d9c39917aa25921c2ae285748b5903e0be7b5d7fb246eda. 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/ES5621350141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0626236d176f0bd3c5d54df233ac913e7c7ae412a4726593a621119823f6fc. 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/ES5621350145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6462f78c2934f271545230ef06f11edecf0d32a9995b1ebd475c4aeea16cafdb. 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/ES5621350150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x600e061178d380c14e45248d0e0cf35895dc91aaabafacc7dc43d7acd8004b79. 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/ES5621350157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87f187590bb3f06fded3b2c5b81af2c5411e4c3d1213f00c5e362ea0b7202e21. 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/ES5621350158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2995a11337182beb63d0f14574d7cbd99deb9a5ed9bb82548228e29b04804d83. 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/ES5621350148.
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 0x6fbbf4763c32230dcbd7e89a9166d4798e5792deddbc315a2a845f1b71301688. 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/ES5621350159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b439092785ff7b9da1d176216f4aa7e82961ddbd033e2ac85e299e5f1553065. 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/ES5621350166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2c3d67b9af4d15148d529b29b27320320aac1d39fe8f0a04a48accee6573ac. 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/ES5621350168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357c0153f28d6af0cce55767c3ddf8b4cb58bf6a52dcf2682ba9495f85afc1c7. 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/ES5621350170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743d074a4e527a30f2c09a006c81afb1195c8a407f6efb5d1ad0717ba841a8b3. 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/ES5621350171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aefb838d10551a388bf55abc39358a3e2bb9418488be93f9fa652ae7da76a24. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/ES5621350162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71521b4f9ce1a40210970b8e819157fb112d49bfb6734d4e9996a3543fa6ad64. 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/ES5621350167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdf50ec0307e00f587c2fd88ef722a5a8b6cd26461117315db890677e4b6f31f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/ES5621350172.
Dama de Honor (Edición Especial Remasterizada)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24803d6ed72c516b99035849ee6bd7aa488707c3a1b094948fffa84e10b585d1. 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/ES5629000158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e42ce250918d6bb6be3ec980e0e8edd4c19837a3fe1d43ac4f077716623f6c. 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/ES5629000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b2de79641d55d76f8734414bae29af0dc7ac103196e891569a657a5255724d. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:49:13Z), 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/ES5629000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceb2ba98079eaf8f826db378f4c798b533eed04d4541b0d3770730ff5e47431. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/ES5629000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3101c9d13489a6780c246f15419edd74e9f2dbda56c250391c8450da3fcd0b70. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ES5629000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef6d96e4e2b794073fd8ff398276165fa89d86900ad1d687f7221de9ccc469e. 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/ES5621350056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5dc2fb4d66eed2ce949ea58c8a0e51e41236dfe2decfbadbe25e7d4e6e8e5c. 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/ES5621350051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db6ca5d5da568f60d5fcfddfc9183d7b6e6ebaa29eaa14f799726836d242ac1. 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/ES5621350055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd77ee5fcd27ce902d9f30ab38ab0c8415926d03a501b372bf952f9a35dfa784c. 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/ES5629300404.