HALO, halo, halos or haloes may refer to: Most commonly Halo (optical phenomenon), with ice crystals Halo (religious iconography), a ring of light around the image of a head Halo (franchise), a sc
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 0xd6106ffa5d262b8ae0648dcc65349b689c162055c00782f9ba201e33dcda57f4. 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/b3510bdc-3fcf-49f5-8fe6-b08a72687f6c.json and https://artists.proofprofile.net/proofs/artist/b3510bdc-3fcf-49f5-8fe6-b08a72687f6c.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 0x9b6542f85e2d23582dbd378a3fb49c49d77405dee5852be1a46b51fbb7809794. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEUM72307297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd7c87dd8b0a3012e972813230c9510e0a5a2c9e64d22f8b765d9eea7c911ae4. 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/GX8KD2398422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a9ae6395a0bf5ca2f45fad0177d6a270e77c8cf632956dca4ebb222a947e10. 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/GX8KD2339430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8cee4075b25b34dad91c1d13482c7e061bbbeb651b89ea86cbefad7e1195bac. 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/GX8LE2271710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3a540cec82eabfa2e94fc813303a2af0fd40874ee0feb60d20a1db711db3f12. 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/QMDA62216043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86501cfd813d38954b4d854e66ec97a2c21575934a2061ffe18cf287f461bcd5. 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/DEWM92200751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92c7a9b69c912bacef96a44d146713fc1ac24942de792ce868574f512e73bb3. 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/DGA062353460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe942b99eb93b64b1cb035568799bfe26fed5573f612d639ca1e563634baa66d9. 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/DEXW62400217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f39db6cb09de47150b9837ac1b51748bd8693fd87072410679f2341fc5ebf3. 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/GX3HH2437232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521bb6221366172949b643973ae7f9b34e72d56530db461fccb2a30dca2c18bf. 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/DEWM92201007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe584725ef542c15d10c01348249f9b1656f327908c2c4e083664718ce7c821ef. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM72403753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb6cd6af759b3a9924d8c29303deca26f2e10cf4360f588ae39cf537119b9c7. 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/GX89G2429320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c0a4be6192891b2345e7a214ac4a4ea1599fc4f7c789286ff3a5de1044cf21. 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/DEWM92200727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd354b0e7fd57b96be0737b4c5c4d4e8f69794c227078797d79119a71400124. 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/DEWM92200675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e744eb86fcb0189778b54b6cb8a30dedbccb216c4b15163ebb4fbfc5043b601. 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/DGA0M2379253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f76112db413a6032bb0d46e78b7d2b8e56e350d76183b272545aa69edcf6d. 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/DGA082348825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0270737f3a3b6c2c2e751e724369d9a291930eba090ed6b5f167a78c4097ed7. 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/DGA092300659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812dc532c2e6a3f74fd401c39a1ce6ed5d981f7ddd902b843126b14ec0af847a. 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/DEWM92200596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b26cf44db2eaaf576d2f6a81788064e6ec55cb817358b0616adf769965c4653. 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/DEWM92200583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48da6b677364e0cc0a508085cb989ba4b16bb15ac1ea32de10624ba35ad89fb1. 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/DEWM92200510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbbe7fd55d9be6dde800f4f558055345a62d4da09051be6631579ed13fe4d6b3. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:02:38Z), 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/GX8LD2301318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5d59556d2f9903d0b4022c279e825b783cef13afde19fce6a6e9668b82b827. 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/DEWM92200519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x066148cdf457fdbdec7c2a031fd76cf30f0c449b16198b1f7b58d795eb41d14d. 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/DEWM92200434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f8352463bce7b895dcea537c39cf9224ed6678392dbff0c1ac51a1fa303955. 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/QMDA72204891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8012789b3a808644e046b7f0d37365f705481c556bdb12c1fb42a57cfdbb470d. 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/QMDA72225917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f921501e6844661913e30d0470ad29b2e62df42571b0191fb38255c49d031c2. 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/QMBZ92472533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb27cec2026461d519324830dd584fac97aa5d4bc43655e99747e56dbc571b108. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEUM72500764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x021bfeed6492b4b5ac2284e62bda8aa8e1224a88dab04798909d3a19a9e33b99. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEWM92201176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a4d737d0827db098f1fd758f868927f74ea634693cd2fcb393e890268bc198. 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/DEWM92201159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e3931eae04fc6385a432a2195bc3b645ea99b6ed52a4db1a6b65642f7af6d2. 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/GX5MY2437265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07018f3ea6fc6e3c2b78849232bae3e96380a272f15e9863edfa85f3792f26fd. 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/DEWM92201095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f11d541e5b725963702023283f84e396ab0bb7bdf3956a75638c074d5275915. 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/GXBDT2487954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1ee0acdb6b9e47de7781c10d92e5410473150553431e5029e1320c2c14ec218. 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/GXBDT2402755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b4fd357569684b8dadcaf1a4682f0b32b083c43bc3282c7ccb2c98bec84d7b. 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/GXBDT2494765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d4f305c6907e0474264f82ebe9825d4ae0b7c3a771255033d67c3d680ec18d. 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/QMDA62457524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a5c2906f8cc2e8c7ecdbba7913e6bf00073a0086b2bb2190180fe15655903a. 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/QM6P42488076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00760bcc179de526cb5b21ad5f49d696be3f46e00b4574fbff7298adfbe04a93. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6N22498769.