A crescent shape (, ); ; . See e.g. the following: is a symbol or emblem used to represent the lunar phase (as it appears in the northern hemisphere) in the first quarter (the "sickle moon"), or
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 0xb1da739362ac0b0af42803434f34539e8c6db0a2909fc742b30586dbe4e66c0e. Chain 2 (Bitcoin): anchored in block 953684 (2026-06-14T19:51:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/64cf000e-fee6-4b6f-b9ed-537eb20b031d.json and https://artists.proofprofile.net/proofs/artist/64cf000e-fee6-4b6f-b9ed-537eb20b031d.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 0xe57499142182b45ad4b1ffe030ffb3e00320c0f376010d4f1cf442d448a59b19. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBDQP1700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa20264877cb0480eb26ccc1f12af573002dd1442e232edffb0a919882b91d0e7. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBDQP1700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe588835afd36f210a89ae789b1466e611c26de5e3a31b30114ada246eebeb18b. 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/GBDQP1700004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2616edbdac005d692a3c52d99c45eff139253a3305b58d776ede5c69fb9155d. 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/GBDQP1700005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb897418c93dc574b32aded9178cb25675bf4f84997c42342dcb9bb237a0a3621. 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/GBDQP1700006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfbbcf2b11bda6ab6453fa3f49a3d2829026d21d09eca09c4bdab0e9c385e9a7. 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/GBDQP1700008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f7aadf3508d360f0a12214cafcdd029808e0cb7599486687d3fa70aa027676. 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/GBDCA0700902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ea9524620cee1fe13cdaf9c2947c56429ce17a2098844ef709d4e1d0d28679. 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/GBDCA0700903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f4dd68f3bf71a1fdba2f730c357a32e958470dc5a6468f4efc1456aacfae2b. 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/GBDCA0700904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe04f3ee7bfa40e60410d7dd4054a14e7058daef50bb76cb1ce0095ad0515c207. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/GBDCA0700906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb79a091777447e448a7d9b769976f930fab1b869c64100b82e0f53a8ce5cf4f7. 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/GBDCA0300225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692bcc3b1ae577a143caa0b311a7e619fb3acded04c7c964fe28be51180e7122. 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/GBDCA0300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc360d8b33ce74cedd07b5a132c466ed8740407e6c8bfc47d22053733247e4377. 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/GBDCA0300256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74309a7ae45b5808e8b1e3406c780d5abc6756537e733bf16cb596d9202b02c5. 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/GBDCA0300257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6983b62d360f1515342d35c78e2b8eb6386bb59d13013a3de7a04b0d5497aea4. 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/GBDCA0300258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da7199781cb8b698c098c0d6501f0bc3fdf5eec87a0733e2cafd3e1ade604f4. 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/GBDCA0300259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb357eae5da101d9a4588e448170756ab9e37a53bcc365a60a871a74e9e2d47e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBDCA0300260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342d14d0206cc2ccf0d7a3b298a274221fc31d0d855f6f80e5c86ab78ad05ade. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBDCA0300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe315641abad342ae0213bae678fac2e0846a3605af2d6e5c7982d2dfe3216e18. 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/USA560568697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ea4cb8eca9b05f572fbf106975dbe6c207de8d462b17c88a25fb1afc3263fe. 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/USA560568698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c5949de47c77d37f0f24a7ded1514c395a9c23360ca29909bb2a6340217090. 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/USA560568702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99986fedd721ac53f2e4b7382033f1c3d5cb17f5e413306a277303a4f514381d. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USA560531172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae683d27a5755351d286924e8c639151eb47540d4d01b9b1df2df05911f9bcb. 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/USA560531173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5fa7bed0c8ebce651f2983c08fd332e9651d5ddfbfe8f27b6aa5242c897f5. 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/USA560531174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd91589d23848b3bcb02cf2b1c08e49969aa4df27a0d9fd5e4f7928efa9aaf5. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USA560531175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9c00226fe0aa0f2b3febe12e25d126783e4b0c0bf6ada4ad86658ff521fd349. 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/USA560531176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a58a3fb430a25c140f2380e2769c802024c2ead3163b87df017f50701e289c. 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/USA560531178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cc9e68b3497d78dfad2b2dfe2d861e5898d69d90ecec19b7d13cf02af8b98d. 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/USA560531180.