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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3c69741bfd6a798690363f1ad1214c2dc43fb531cb27e6987923829061db140. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/edc13fd0-ab92-4203-bd36-d739a9ea14ac.json and https://artists.proofprofile.net/proofs/artist/edc13fd0-ab92-4203-bd36-d739a9ea14ac.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f3395f319fcdbee6d04474b8f05ca5113962c4e1a4a256bfc75dd8388af03. 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/QZK6H2412522.
Hino 371 CCB - Aos Teus Pés me Apresento
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6e212dbf58d891db843563497b9a61e0fea89c3748dc8b9e598103aae1ceb. 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/QZK6H2412523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfdf2f53d4a1606567b83ffb5bf0eaf98e3b7ff56b06edea5beda5f6fa660b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZK6H2412524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d7738f13f272cec678044c94d8fa72c5c407b50d2c6ac7f47c6cde44654245. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZK6H2412526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105181f5a076ac0e6189e87b3c4eedce656d52e9bd7237eb686bd92c85f1f466. 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/QZK6H2412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf246bcfabcc2c8052dad68c9f47bb1125e0d613011c660adec235f8c78beff2c. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZK6H2412528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743e899776e16e2e01e01653a26d3170dc8a30ab38c1e3a6e8d8dae07d063647. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:29:19Z), 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/QZK6H2412529.
Hino 296 CCB - Teu Nome é Soberano, Ó Redentor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1459eb95cd8699cfb1b2f0157a1d8f564b0d1175ea41e3b77f6f4f6eca4c897. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZK6H2412530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c291d62ce91cc5ae3a3c306fb208a26fce3dbcb12328eff9476642a4fe7ccc. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZTBA2470859.
Hino 184 CCB - Nós Te Louvamos Por Fé Grande Deus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ab81a8cab6ddf181f6d0d63bd65652591f497fcc322a82f7a575924ac9ae1. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTBA2470863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf246bcfabcc2c8052dad68c9f47bb1125e0d613011c660adec235f8c78beff2c. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:48:27Z), 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/QZK6H2412528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37cfdf2f53d4a1606567b83ffb5bf0eaf98e3b7ff56b06edea5beda5f6fa660b. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZK6H2412524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe2ccb5ef65661b49e26a630b8e9fbed89a7b845861004e2489aafa945c840f3. Chain 2 (Bitcoin): anchored in block 957810 (2026-07-13T05:55:46Z), 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/QZK6H2412521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f3395f319fcdbee6d04474b8f05ca5113962c4e1a4a256bfc75dd8388af03. 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/QZK6H2412522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105181f5a076ac0e6189e87b3c4eedce656d52e9bd7237eb686bd92c85f1f466. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZK6H2412527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1da6e212dbf58d891db843563497b9a61e0fea89c3748dc8b9e598103aae1ceb. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6H2412523.