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 0xde97f92a756cb930aab1a74c07cf5c6deeaeca4856c45fdb21c9074638f5fac7. 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/b0040b18-c3c9-49da-8e85-dca9a592b46a.json and https://artists.proofprofile.net/proofs/artist/b0040b18-c3c9-49da-8e85-dca9a592b46a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Músicas para o Centro, Vol. 1 (Acústico)
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 0x009d3041845d709eaa23cffe10ff2e70783b47ffd96e36d0778e3b25de0bfcb7. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZHZ41986356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d2155e8bb1c53342a64fb717040bccb9754c705566fe02d73f01b765e6f34d6. 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/QZHZ41986358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x972fbb664062342dad6bf4d93f8998dc1d239f0841cef0f87c28a71e8e882203. 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/QZHZ41986362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb693c9ef2e787025488ada6480b77d9e0ad6c56daffb19cf84de2f5640ba273. 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/QZHZ41986364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb08818e816db8af6bb44ce67f0cdf88b85b849d67d48da3be82d6abb84ca20b2. 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/QZHZ41986365.
Músicas para o Centro, Vol. 2 (Acústico)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7946d72cf058ccb7cea2e3b35d528555500d4a4ba5785d404afa0072f46d37. 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/QZGLM2060508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d1fb263482276009612e8cb8320cf5233e06dcea221028ef0e2ac3ab575a336. 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/QZGLM2060509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x305115e784ffbf148fb86a7e94adbbbdf33b269ad701eaf31d145ba17ba8ca81. 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/QZGLM2060510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd37d57637c2e8f64c366f31d8285d1885c13faebf55a5342e43558d383462724. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/QZGLM2060511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10bbe30256b989f85e04e243763fed0b585e3c5685970eeeedc0cc67579fcab. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZGLM2060514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d7974ca71f724b018bc9a84c55a8be719fd6d7ab7c32f194340df30524c04e. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZGLM2060515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af0a74c92b609316c584b8d5811f4a0829a8f02761dce6fefd4a1470a10f2fd. 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/QZGLM2060516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74bc787c76e0677c7cb74ffaa1a7c6f8153a7bf8393a898050477debef6252c5. 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/QZGLM2060517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6913ab1a2c6a91c44e19463e8ad18003d87568bb36a6fc7b25a9ae3d2dd50a1f. 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/QZGLS2001819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9180b9062b750b1d4da134af6c65f818e06801584cf303151a8d94e5ad93b739. 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/QZGLS2001820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24007478c824a315ff978c268e8761b516192c94285c25abe2ae7d5327c18135. 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/QZGLS2001821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd266ef539ca02efcd78e59ece6efb0b63be5a2008427273189ee72a7b93fa92e. 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/QZGLS2001822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90eb3edab1524595659db5b18fba26f9610f6757fc4328d79f807328b8bf7fa2. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZGLS2001823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf964f5101dd30ebc035dbf8842735ba2176d774c021e0033720b200cb2d39dcf. 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/QZGLS2001824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ca4ac575d8a4a3bd414d02c2640672b174ceafa4205713eafa5a7388b9ac8c. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZGLS2001825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda34db2647b3ab542ac8d5ebb70e61e2e8ff295f9ba2efd5b76eab680c1c2985. 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/QZGLS2001827.