The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. The
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 0xb76e3dd3390b0437948a2e6971ee734e8c4df2d2437b5dafde92fb8f2ab087c7. 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/9e0467f9-d669-4507-a2f9-2c6c0ab610b2.json and https://artists.proofprofile.net/proofs/artist/9e0467f9-d669-4507-a2f9-2c6c0ab610b2.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 0xe5120400ad6a414382d9915966d583de57e8ddaa8da6e8f8b127ca8db324fa69. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GX38U2195948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d536af940c243801f3e7af20b402d91408f7e2eb347a3eab52a07cdf2515e5. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GX38U2195961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9ec829e05764810e3d44506fd41ff6fbe141fd11c5e71bc084bd020ce8a78b. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX38U2195962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f905ed6e6cf1781ca3a7ade43c37dd9e9ca3e3ad6026e5f3e8acbc4aecaf5eb. 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/GX38U2195963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007f1dbf8c00b156984a8b9c20742b01c51822cced906a035638fca0ac52d62c. 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/GX38U2195969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10897e728b5b7b20e70e119fa561b13ebd8d7487ec9978b410bdf99a3ee3bd76. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/GX38U2195970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588289cea94ecebc952e8863cdc46bdd1f1f156df469ca37dbf58b871f6a4883. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/GX38U2195977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba95d145ffb3f696e9357382e7d1f07ee0f8a11f0528a5864f523ce5251d49a9. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX38U2195978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe16ecc429261d00deb9635467010c02b65f1dad6815ac85d26c9e110abb5cb86. 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/GX38U2195994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535fc65857eccce1d36aa292fd466444501cd6bb23942ae54fec6df687767672. 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/GX38U2239340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e98c7052d8e60675a1d94a2f24cfa68d98fec9d5f9371a507f2e7fdbfcd1f6b. 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/GX38U2239347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be3c372c69a5efe56c1e61e201609a862d71f5315088bcb6b9096ca0d4808f. 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/GX38U2239349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4be8b0500e60eab36badfe03b2e520960a4791cfe9611512d5028dd7ff17d78. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/GX4R52295157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebd5fd4d934eae30cff0ba83c485d753e668443bee7b463e038d6b736fe65f95. 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/GX4R52295159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1867d16d7fa96532fc05d7c99fd680fadbfe43b7cde1b782fbc71d184143b050. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GX5MY2248692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x760df5b064bb7759fadff2d656117d3accd5deda281c8ded16362107b0bdedfa. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/GXBDS2426687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27458bf8e3f2c5e5e15d195083113fb3e6f18ea446c567a03746a704a27947d5. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/GXBDS2498017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f9e282bc570916b03de716b497ed04ffad6259f752f7ec3c382a0303e25dc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/GXBDS2495556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca4ecf487bc3352b0c43bfde8545959097f086f5ea5375a8d2283a657246fcd0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GXBDS2458218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5045b2b9e9fa9a23c335db3a6d2f9210ed2877ed98e470e453cb133cf5ca677d. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/GX38U2416995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023b6b2b3e9f602774c50cc4b776ca86faee68b89c38bb2c2277683da2102299. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/GX5MX2456127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x342e6b2da676d00b9b1d727f1e227a6e06f25eb54c2c32cb0b1c3b3f89161295. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX5MX2429479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc86956d585102c4198d6c8c6af5d13a1dcefaa4c356517e1d61a0e28745e7f4. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/GX38U2239344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e98c7052d8e60675a1d94a2f24cfa68d98fec9d5f9371a507f2e7fdbfcd1f6b. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX38U2239347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27be3c372c69a5efe56c1e61e201609a862d71f5315088bcb6b9096ca0d4808f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX38U2239349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a54ae1fbc263a0bf16ca0fef2f2b5b0138f4450422df7445debab838e8ade7f. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GXBDS2409294.