B2A may refer to: Business-to-government (business-to-administration) Haplogroup B2a, a subtype of Haplogroup B (mtDNA) B2A (BRT), a bus route in Guangzhou B2A class, traditional motorcycles with
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 0x927542d8ba905c68226a18e42387209515f520ee35658cb09d35ca06289f988c. 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/df02b543-cd14-46de-8480-d3274e7c9be6.json and https://artists.proofprofile.net/proofs/artist/df02b543-cd14-46de-8480-d3274e7c9be6.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 0xe4c6a08e1ad18ef6e7846d137171843292703e0a5291884c553d92f561a3edc4. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/CAHQJ1982096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ed4404d958f2d2d0f4e89b0477818ce6dec01a65b5d6f0e732ad18b786a115. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZFZ32062602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f85e902912398230dfdb463f4ade88e03ade662fbf1707a63e5771f8ee2011b. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CACWV2055060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7922646fda0eab65abbd4b136be7fd032896085f833679f0ed1fe8b7500d2fc0. 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/QZHN42022793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa406936eedc983cc3471494f025d654d97d24af85ee78f3d82396dfda9b1935b. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/CAENV2011072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09947cd11bbf62175427c5711808ae7183504e221b1bcfebcaf50b0684942c69. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/QZNWU2078096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8556e0f18f35cfdbe8f111a152a023eac17ed8e278f8931e27b4e73034c998bd. 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/CAHQJ2017589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6955263a7c751c8ebc06868ad7589aec88b82e8b03db5dc04cbdcac5db5ab6bb. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZDA82109940.
All I Want For Christmas (Hardstyle Edit)
All I Want For Christmas - Hardstyle Edit
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d732c3edf56b81c19d47d521636b23a32d74d37e9ed7fce88ab170668509b9d. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZRP42197101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f0a595fd6bed4613c459488ce7e16efaabb31174afec27ed4d2b807ede07fb. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN82236949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc836d1e5cc248c93371a008c8d8f713c6816458ecdfa2e960838ac022695ba7. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEN2267925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x412d12a5413a5dec84aa62a4452e418a688d00b4a6f806eb406a6b53531011a6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTAS2230887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb472937169effbbabebc134c333e6c28300f9f1cf8e1496ee6d8e13889119bb2. 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/QZDA52352052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448683c943cf6377b5ba4b1588125e9763db19eeac91343a55c7982e1efc0a02. 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/QZPLR2398905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1791d00b24217ef15879d8321b6ef9e13ebcda521d4657c6b3158fa239017536. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZTB52327952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9e2c9085f012a20480d53bbf61dd05080b052f93eee27b9248a2445d2b7b55. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/QZTBC2347328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9878987f94da0190f56d1ecc21d2a6252e7b3be9663ba99aef106afe863c32a. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZWFL2346453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d50173fe2d55eea4676c8bd65c3e2381d4f2066df4a8546ad27fae28d956ab. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ42423881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6df53641e733fa03763f2ff0756ed355d209a3f2d07b98fb2412b64dc94c9cc. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/QZES72405850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1fb8d20fceb1004f83725402c9cd3523d8c863752715450f9e8cc1f2de64395. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/NL5MF2102970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ca69dd958d7297da618fc47b079cea77858005db08872324588aec8ed31e2d. 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/QZNWU2474895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a7ee38a98977a6a9f2e76f10cfdb05259ffd1ee59049aee247971f8a1441b. 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/NLQ8D2101147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c62734070fbb7d63946a1362a542e2009fdf625e58aba7f2374bb17757fb809. 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/NLQ8D2000157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f1da46296ec80d6ede30b39b7e3479929563691e48b36ad96397b6b512ec40. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/NLQ8D2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3295574129b42ac271f88164fc0bb2f37642c45981771010e1f83392d7814ff8. 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/NLQ8D2000046.