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 0xd0d92d9982d540deecfc237bacc5c554043004e4452780d63ecdf141af7ece7e. 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/c4d6361d-c99f-49dd-b389-b989ced162c3.json and https://artists.proofprofile.net/proofs/artist/c4d6361d-c99f-49dd-b389-b989ced162c3.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 0x5ad01c3315b9483a5a226c0874d7f3cfd6a86e8296dba1894c62711824f046a1. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZGLS1991263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95be57d9ad0108af06d40f226ca6ada765b13024987fdc81cdde97308911dc5a. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZGLS1991265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35ca28ef69af0c47d9a14377831a4f4b939fbd175af5dc0d23a4d14917c797ed. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZGLS1996850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf579671751145dd07e1c5588d602aebd2d3cc5338da23560e6f1fa08b28133f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZGLS1996852.
O Melhor de Marquinho Sathan (Remasterizado)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edc9c43dde0e5888f2576e39acbad8ad3c2a580b09d3674e521a66a3ab7f7cf. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/US7VG1993113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8904bee1304c55f4589bfc646c0fede885703ebc4ad427a51a5cc11f97323757. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/US7VG1993114.
O Rei do Cheque Sem Fundo - Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x425a2c4aa3f3740705c0b0f29868a20ae0cd070554ef2aec190711ffff7c46b2. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/US7VG1993115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c131adcc402bd45fa74604d7b2fdbf66e647f86d49685785dba8dfe4bb5903. 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/US7VG1993116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7765e21c1598ac08c25176fba380a68977df155ccf085eeedec71e84de1d88da. 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/US7VG1993117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af71d0d6fbeb44e00cabd6094dc04769e7372cd06ef3fc65686194dbcfc85b4. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/US7VG1993120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9355284fd8f77e9a442d8ec5d4bb7432062793b723c11fd579d359792782e4c. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/US7VG1993122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4566b130fd66d2f7a87082ce601d0f26f0897536e8a5eae8d35ab8e619e119bd. 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/QZGLS1987022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869c436e9116616c5bbc6009e2ff801515293a4412602898b20d7882278f995e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZGLS1987023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15588d092e736a78747a615fd99d1de477c813741390b6531b9ce817177becb4. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/QZGLS1987024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6c26866d37e392d74c027bb9fbb3db060bee7e02914e9a50a6ef25b2f61139c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZGLS1987027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d910dd9941347b488140ab18ba18b896f93c702ec91a5c0ae2da372f33d7022. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/QZGLS1987028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6366b7dfabf8a6cdd6dec75af473981fc1cd5722ad11c50e7e85a2e0d05f4b5. 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/QZGLS1987029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7dc298e1d694a9a4b6bc396f05c215a096e760fd7740ab2a2f8d617b00805d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZGLS1987030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e8ce0ea874ea8d42eb2d1f113566a46d221562fb5dd8d2624c73f38966cc10. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/QZGLS1987032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9a8abb0ca43c1266f2e9aa1e55df3b22b65f71ce814be3a269248a32048eef. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZGLS1987033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3497de84d16751802e46dfefedd97750ed8d89f0d99b84ace8215570cae6a8. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZGLS1987034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877f371c13ca7d63b36d953a210b8643145c70648e1414c22dbe16c3531a67e3. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/QZGLS1987035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf87f5c2907ed93ade9993e5a47535c605f614759bb8d5177c8e392aaee02081. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/QZGLS1987036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d97292895a9790984ec2647d84f675618eb347c264303f063824d4e20870d86. 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/QZGLS1987037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48fe55444e38f802e71bf9b19ba516983fae1992fcd390da3ef50528f6b803bd. 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/QZGLS1912178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e01a7e8ea05cb2afc93686b48e09f89515ba7938ee2894de491d0712ee5e87. 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/QZGLS1912179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa1acef8246cadd27081723dd0341541beb4b7a8bcb6bf1f6fe966174a7cd18f. 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/QZGLS1912181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x350a51d206f9b2545d129007301a1396106c1c8ccf9b5d7c3ab2e07df44f1729. 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/QZGLS1912183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4f838358f6dd0c7641c026a0cfb823ebd13b37bc732dca5b6663f54d890b46. 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/QZGLS1912184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x345e999beae675060a91f6ab240b0eb1a9e1fa443d3b8b0f7dcabbf573934322. 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/QZGLS1912185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452e2dc53c5135a12866f1b971444e7d38e5570453ad3ce0c1993548bc0da711. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T15:07:00Z), 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/QZGLS1912187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefbf33cfd59f80e7a6e0882509c4162ef345b1aa2449825431d30f78e9376c3. 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/QZGLS1912189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3023a074e739f8b2ebd965d7c2690930bb571338e516ae9c00c30e505a62c30d. 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/BRWMB9900273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafac5bef1d8e77bd0510f06e0168a0a391087f5aebc7b53f545840b129603e5e. 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/BRWMB0001233.