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 0xbf2bd7f89dae7dab346fc5fb46693c7838ff7a132f22091a7aeae1fe3959537e. 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/2281d530-02b8-4613-95a6-ac5b69d40030.json and https://artists.proofprofile.net/proofs/artist/2281d530-02b8-4613-95a6-ac5b69d40030.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 0xc8a2302baa0ae9efcdc2606dce18a171542cdc6079ec0269b30fd492f65845cc. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/BRRGE2200905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe28df351167d6bd9ecf3f5011fbf7023847183d708488213de9dea4807dd4811. 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/BRRGE2200852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53cd82dc7a3c49b04139e6b555fabadbaa3a8209a3ed4e706ec09f968ea6901. 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/BRRGE2200342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f9baf16ea28af38ead36bd45ce1302a792b0a723c543e5ff9da14acec45b322. 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/BRRGE2200860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7151a8e477dd0ad9022fef5d510d97f071299af583c8964c0428c06934152286. 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/BXDFR2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d04ae5cd3cb626905ff5e02bfd6189049080fc07673b1ce261b82b7808dee4. 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/BXDFR2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13561b85d922e6b49c4840498d0b9ce9a46dab0dccf36515c3549b18bf636b94. 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/BXDFR2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465cb57d3eb050023e21da89e7925b5c27c63cfdaf1501e359543b93aa3261f2. 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/BXDFR2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290feba558eac896f22a41be7ba49050aa62891d84df131ea3e7b3f3b0f8f9e4. 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/BXDFR2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b96b92d7e508407250fc2b64352a6c5289013937631ef9e9dbead76805c378. 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/BXDFR1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7565975a50fc1fe41c98843213643197e75afbe9bdc63e820bc54b18125f6441. 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/BR1XO2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561bc217f21f8b9c4efff32b1861d5d43350f391d5024a4aa79569aacf1a0484. 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/BR1XO2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ec85de73832f353dbdc1637af8e83b08e33e2b9c7cccb088781e4768d0760. 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/BR1XO2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434857c5f495bbe203f6f5610bfc39a640227f7221b922b989109c885f6000c9. 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/BR1XO2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85575390097576da2a7cea4f83f031553a206f5614a860caae7e987f7e8102ab. 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/CAN112100834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2333f37a604d938a109126cfcd1aae572db58dee2f162cbb7bff5eb1d0c02f. 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/TCABE1226623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84e9db115680a387a1d8655b0d5a9a2e62e7de67445869c540ea1588406f455d. 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/BXDFR2200033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04d04ae5cd3cb626905ff5e02bfd6189049080fc07673b1ce261b82b7808dee4. 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/BXDFR2200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13561b85d922e6b49c4840498d0b9ce9a46dab0dccf36515c3549b18bf636b94. 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/BXDFR2200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58f1b3447a12dd368434ebcd36f7c2d195d30daec4af480743ee782472873251. 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/BXDFR2200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb2ae9d36b91938f7a90b7089dda3de664fc33af65e182fa5d91f0e2952e08c. 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/BXDFR2200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257a335ba0f1e2e9320a3396317d24a0ba264bde5c64cbe8542011c2f241b1a3. 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/BXDFR2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51f91c993cc537638c2166da9948987dd9a18874cf4230f389fe752866033ee. 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/BXDFR1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b96b92d7e508407250fc2b64352a6c5289013937631ef9e9dbead76805c378. 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/BXDFR1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e748e7be9229b4a6886ff0ff31547a4cdfb2341b37d4f00118bd97ab6cce9d4. 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/BXDFR1900052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fb57d109090743cc0d7a9e1aed17dab34598193529bc4e5315a6f53ed13c9b. 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/BXDFR2000058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0612e261b0565d74c44666198be36fa8b6d5a6d0e8acf3ab3e2c7b41204a054e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/BXDFR2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2fbb95135d94aa2a97ce4be90b0f32ca3714aa0d5f6bf2baa1584a06037f72. 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/BKCHO2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457bb7ee6472835a6cfd464aaf18c85fb74ee97ab8a973bbbcb0022b1f50d301. 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/DEXC82100090.
Onze (Músicas Inéditas de Adoniran Barbosa)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7bcfc6beae400e70ac9d6995ef0d7de2059e991b9344b282db058b0a87bfef. 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/BXDFR2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf21ab8643af3c1e0551704c6e114e2a8772c3c41b777f6dfab721a927fd6a11. 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/BXDFR2000018.