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 0x9c1e4c0d885314c5d81f95419082d6bbe972d475ffaf1a3c492b4be840a5e953. 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/109ab8dc-78a1-4c2f-9fe0-4ad095de040d.json and https://artists.proofprofile.net/proofs/artist/109ab8dc-78a1-4c2f-9fe0-4ad095de040d.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 0x064f58e582b8d8db68d54561143cf63dd6742b5b392a64f27ac745703af1bb51. 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/BK3112400449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb570ccd31e70a0258c18868798dcce4f447d2b711a91b374b643a8d264df6905. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/BR2DX2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b17d9f1753bbade7acde03f4e93605e45a5100d73168724e141e0a8489589f0. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/BR2DX2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb2be671454a300577c4a6b4a350917fe1f8f6c4b2d361868e78539f2c6d269. 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/BR2DX2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540531a625fa625c1de6c5cf606f1445906034e2796cb9794b2f1222c790ddbf. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BR2DX2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x445188b2fcefd22f010b524b0b142de85c0fb25bf9d4043d9500b4e7456f3280. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/BR2DX2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd7c90d90cb4e4aafaa475abe0407b5d37c09524c6529bff1afa4cb0fbaeb63. 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/BR2DX2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f80ecdc55127bd70955a7f894d1a77d16c2dcd5c520b997740e19975ffd1d05. 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/BR2DX2200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf2414dc08b392f8f9bfc8744d219def1df78f368b8863e501a18ffcff0a4d8. 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/BR2DX2200016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309ea8e57e36fc076f74e51617f2efe5c00af30986527fbc5bfbf4d2ad59759e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BR2DX2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177ab2fcde8753b09764574621083949095f51c26b3e712f4e04c526cd752cd2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BR2DX2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521c52a60dc6df2e3e5b802358db66b4508d5182068cee64fd3278703f06112e. 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/BR2DX2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87198ba19d98469599eef727f720d4ccd490d37d22bc0a761312e5fa1df5be. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/BXLNL2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8a64f5960ccb41f4433e3d7522fe98857deb00f8efd040a6b0181f31fae6af. 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/BXLNL2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602d8310dfd295fffd2bcc8cde4807489fbc0a2fc366fecbb17206a1b8e932c8. 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/BR2DX2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9e66672a0bb6048bb86604e24e8a936ce1071bbaf0522e9a3f4c195119fe2e. 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/BR2DX2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb18207552ec9d20d01077372dc5a253d55a4ce1b75b160004d16a0e8d3049496. 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/BR2DX2200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7021ef639e1d01074adce72b0c0f972140f565241da53028801f4400659f9461. 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/BR2DX2300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1751834b74e9ffb38f3b63fa851675fa3d62046623daac40b2d7a006022fafd8. 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/BR2DX2200025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa320bf832351ad2414a3aa3e21cf4186915fb4aa97719543f8c7957afe01340. 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/BR2DX2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc392ea6d7dc700c0c73a8fd5e84b8722f3fa011b4beed24f7813329f33d8fb83. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/BR2DX2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08b652a5d9e873d8ad7c298a6e1ca664bafb459efa0912c07c3d10ad84c49381. 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/QZGLM2580737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x601fe91a32619914d19031a444a388db474b95526b94fda029992fc3050a1e43. 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/BKTRR2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70836770a09bfe03b1c20087dafe2f2c8bc2818e37307e7b5829692ed6323f82. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BCE7P2400913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e28813e2014f74ade63c38127ed09ebd8dc0c8bd49d9866666c19d1c30b6372. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXS322400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67a7e142f4444cdff125706910957e704be9d8319f5b2e4300afe74f9f476ef. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/BCM9B2401673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1788e27dfca2f49e598f7c3f0309d6dad508b71fe7eb71df76131d1c7301dc88. 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/BR2DX2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046612839118ec00c3ef4f0757af6aada82a319f2480a2c8ea3df6ef0311f2fd. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BRKO12400747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ab275d4d501ed35327abaad33eb9a35108ae99aa9e9fb666c3a7cb57e366b2. Chain 2 (Bitcoin): anchored in block 960191 (2026-07-30T01:51:26Z), 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/BCM9B2400482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dca29df0a5574b6593b6ad70b4521ebeeb3e49df63f80aa1a69b4487a7a3a8. 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/BCY5V2200045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e87198ba19d98469599eef727f720d4ccd490d37d22bc0a761312e5fa1df5be. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BXLNL2300004.
Hoje Nós Vai Tacar (feat. É O CAVERINHA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215881deaa4f33773f5b00e0a83ebf86e4e22a504fbcf6c57aa8bf568ece94a1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX7272400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb959b4ac498684cbd299be8e9d247907eb8b8b0dd96e8399e75941630f87a5. 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/BXLNL2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6a1c2933fbc71be86167e1eaac1c6d5cf51d1a89b1f225e552b4427264494f. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/BKTC52500023.