Index (: indexes or indices) may refer to: Arts, entertainment, and media Fictional entities Index (A Certain Magical Index), a character in the light novel series A Certain Magical Index The Index
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 0x3991152722a43890e777beba2c423318219510614eb657f6dec497af62bbd497. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f48d81a-1310-4661-ae0b-aab0f1b673b6.json and https://artists.proofprofile.net/proofs/artist/6f48d81a-1310-4661-ae0b-aab0f1b673b6.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 0x11b51b94decc3592e5f69fe0a56f32e002060c4ee517d2f787b34fb2646249e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ARF410700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe310ea12150913c415f4c8586611d1442a66ee6f6eeb3c3e32c9ee43152ba7e. 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/ARF410400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02165f549db3f77eb75c1750d70702f679833bb45ead8f71bf21a0d1f2c3275. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/ARF410200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9d156fee65cc4bbca4995ce72c00bcbef24cb6c52fe47c5fca83a8401a29a8. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ARF410400199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b56f1a985f4c7d82e1d10915691bb8f5626a161c03a783f8e5136cf94b2d47. 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/ARF410300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e1871d4cdf573227e4b1704f079bb7eb68ecee21bd3411a92bc87953fe09a. 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/ARF410500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb02165f549db3f77eb75c1750d70702f679833bb45ead8f71bf21a0d1f2c3275. 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/ARF410200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1ae66a90b09b22957bf36142200ca386fbb5b91cc39b7cb7696abcd766e4a. 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/ARF410802099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe310ea12150913c415f4c8586611d1442a66ee6f6eeb3c3e32c9ee43152ba7e. 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/ARF410400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b51b94decc3592e5f69fe0a56f32e002060c4ee517d2f787b34fb2646249e2. 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/ARF410700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11b51b94decc3592e5f69fe0a56f32e002060c4ee517d2f787b34fb2646249e2. 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/ARF410700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d1ae66a90b09b22957bf36142200ca386fbb5b91cc39b7cb7696abcd766e4a. 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/ARF410802099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673e1871d4cdf573227e4b1704f079bb7eb68ecee21bd3411a92bc87953fe09a. 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/ARF410500017.
Chill N' Flamenco - Essential Flamenco Chill Out Moods
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe310ea12150913c415f4c8586611d1442a66ee6f6eeb3c3e32c9ee43152ba7e. 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/ARF410400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b693abd67fdf07a88847a740b7dde08987c0bf3b4c0adf9f1b06404523b647. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/ARF410400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d8ba22fb401c32962d97d82d8be703491304264f48bd399fc7d523904af2f. 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/ARF410300095.
Chill out: Punta Del Este Sessions Vol. II
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e7884d7ab79363e8dd785e69de254637646cfaf4df45eb67075dd83cf2279f. 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/ARF410300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bc242a468fac2e86f589ba8fb6c00b621d12d51233050192b0fd5860c359d6. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/ARF410600507.