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 0x5c54654e67604ac990ca667a4fe9a2f267f01b3d1e3d450c9002992bc9c7611e. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd79b8be-e020-41ce-a333-48dd43b60daa.json and https://artists.proofprofile.net/proofs/artist/cd79b8be-e020-41ce-a333-48dd43b60daa.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 0xd0e9f75fb8905e4c8f06316dc6badd9369e521940dce33a208b53fc4c9dcd4a2. 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/BC8XW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9322c5982655f05d7b595a9a8ca4e47773e400d2586efc5065a4782ed9354eb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BC8XW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567004fdfbe872b7b6699dce9246444550da00b92be2a7a4e58c7d001a8fa565. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BC8XW2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91604f889b674567ed7b913e5d0fb8f86c61935a88b3653181900172685e72b. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BC8XW2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b65e867029046db744277414fff30cc23c08e1d2374089ae7ac16b55af94697. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BC8XW2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9322c5982655f05d7b595a9a8ca4e47773e400d2586efc5065a4782ed9354eb. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BC8XW2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5a6ab3488b6adf34791b4bd020f8a534dcc9e3135071389c39d4914d8ca950. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/BC8XW2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e9f75fb8905e4c8f06316dc6badd9369e521940dce33a208b53fc4c9dcd4a2. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/BC8XW2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd58fe3e535fb24baecf26ba14fbcd59a79958afac49b99e9c3dd41273641b9d4. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BC8XW2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b5a32ae47f39d1de020f397029b28f556eabdc1e107cc3c1ec7931c8794eae. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/BC8XW2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdceca93c1f70db14bfb7293d7fc74b048b3198d3a9ba767ab04efab686dfe72c. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/BC8XW2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3dd0099ee8073beb595a728f3c3412c6445aa54dcc69db1a125901ac651a0f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BC8XW2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b17f68567ef0f9533f8521b5ac443be8645363301649da1810a5c075de6712. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/BC8XW2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b5ba261fdc502f07f15dedb87d518aacf601a2020268e754454d7cdf8c175c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BRAGL2200075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e2df69113a6b33c7c8d8b7549f1dace1caa8ffde4277c9fc8341c3704280e5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BXTYT2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68533ae63c21867dfebf6a07042322a2f9e1d361e5d7c707b946a2bc27a85517. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/BXTYT2000013.
Nossa Voz (A Mão Que Bate o Tambor É Feminina)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48d088e84c508f246be1af1450646df4cb38e270efd9f0949cc8c2b8a98e2c4. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/BC0C52200001.