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 0x1f7a7dba98d80888592cbfd587d404e9c5115bdc66e841f2081716be03ae55d3. 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/6fd949dd-3eac-4c89-8a49-f72b71c22dd4.json and https://artists.proofprofile.net/proofs/artist/6fd949dd-3eac-4c89-8a49-f72b71c22dd4.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 0x91de379804c98feb6d2cb781abc55ddf58ba131aa23df95dbec48e6b2777920b. 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/USHM81446215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x115c986de0cc148565d1d40d8a53feeb9ccddd0019abc8d1b30dfa672ff4248f. 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/USHM81446217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc99e60efd33575501765ca943ebe21ca8dba04165fac60fff07a97c02e01b4c. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USHM81446218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68af99002ce3a3c4401a11e3e3b46241ec2196ef7ed31bf92881260ef85e0c3. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:13Z), 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/USHM81446220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2f5197950d7bf419118a610bc23b20aaea89c04a921b7592a955f85b207c44b. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/USHM81446221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc019138c388d1c90c1e2e6d3d030a516ed8979c4f96a08f833be2d5c1c4aceaf. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM81446224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc080966be3332afa22044e0a80fa360aa5d361279ea6465f888aed6dee0a410a. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:12:33Z), 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/USHM81446228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465c669d155031a0d88baab0ec2526acb35de9d76f2160996becd621ce35f7e7. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:56:56Z), 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/USHM81446229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84abf9b9fafef929aa5efd58443f6edd44ad15bc9084df4131cc4e811c691be. 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/USHM81428235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517003bbf99d05f795e2df79bbe54a73e53262eb9e9b1c6e08993bc482ec7b5. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/USHM81428237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e3ead2231778f97e0c3de345c3e0c48928d0c6a784f6b11e69b0cddc3b2363. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/USHM81428240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe024db381507aed60a353df0d8b757b337bb28c3ed7d10b7fbfd39c9d1d94936. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:26:43Z), 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/USHM81428245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1fdc27719c9c6703f6520e3b8e42cc7dba8f6f83ffdbb6cef0b34a85aca9db. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T11:08:35Z), 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/USHM81549826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254cb6310e9c9603f0da0827fbb47e22a735a4eb78c8d4f4116235676434b6d6. 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/USHM81549827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b59be6e8ecf5d59b601ccd7c6df231876b9aef7bc34fd704c5d606f3b3ecc5. 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/USHM81549830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f9b88a2fca2b3bd03bfba6d91574cb49e9d95f50e89ca027f4a1b493e44608c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM81549832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f64aa918acd48bac4398743e24debcd525d96314efc18e0bd5d32569b400bf3. 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/USHM81549833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2afd18efdc8bd089f9a79eec1060430eb456c8ff66c5bd322f7d9be1a8b032d1. 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/USHM81549834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ca22c6115b9aacd9b241c2ad3ee1da10a9f52ecddbeeeb8863e5bbf69d98f. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:13Z), 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/USHM81549835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa709b4156dc6d9f5b963659b60f571eee205c5173d98eb5eea7aa90900aecdf4. 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/USHM81549836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9908ae3d359385cf8458c5fdcb9f8501ec126632137d2193fa633f33bc7000. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/BRFU71900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4bf0b81727a2c5e860947ba0978ea9020fd4d2dfa895f56eade4af6887d467a. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BRFU72000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf66b09cb8570902493e56f9574dd47a6b30d0e9204c7cac38e9906253e7890d4. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/BRFU72100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bf55a4b67a08475508997d4209786ad9c4704310fe7361dd4eb69a99551412. 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/BRFU72100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefa6908aa941f24a8a9dcdd48c66bb46154ae328f2ba12c1053da1478a448426. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:52:28Z), 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/BRFU72100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbe5b5a22af15337accf29671cd9aa9452f9760e4d632d23bc6d91b8de877296. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/BRFU72100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bf35223058bd8ac7c2d2f983fae83d29f0aad943f79b8ce149dbecef8a9cbfe. 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/BRFU72100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5891d911357997df42e5124d5e035d18f2e06e7b428ff0588a9aeaf85fa5f41d. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:42:51Z), 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/BRFU72100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79cc3dcda2c44e329015dea6d126a84d7eb42546eb7da12afb38629c494affc. 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/BRFU72200086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e5dc97cb8a9bc290ed5defd5e2626178d670833ef10c8ae66080306f278a41. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/BRFU72300036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d24674b33766b9db4abc3920750b7538d62836ca08f2eee04486720c08f4b6. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRFU72300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6940d959a53ae93f2dc867bff91e8738bc12aa6c26b1f639907f9b7edb236828. 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/BRFU72300031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b96bcded610572d80168c90171747ddced0314fb877aab5b646ecbbb6dd737. 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/BRFU72500087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34eb0ea0e4a30b38ef1c82577858ade307378f5f4843852dab446f25f5811b58. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USHM81583339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58c5ec43280785f9893e1629a330e8e549f17a47be44fb8fc12571e6adc55085. 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/USHM81583343.
Estamos em Festa / Festa do Rei Jesus / Eu Tenho Paz Como um Rio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c0d5c392746fd979eef1bf436a94b544d91d476857fe238dd26d7462f2d464. 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/USHM81583345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc00e3db5491634f1c3190d5feaadf3a208d932be4716dd9095137067c3cd755. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/USHM21571307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0643ac380455d55f56af9c3dc1399ef7040d8b5c07a317c4ca555170a68d2038. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM21571308.