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 0x26b7829893e6834181c5c8b8736d14f9a6f2ce54f7a72d9a002270c62e0fed5d. Chain 2 (Bitcoin): anchored in block 953750 (2026-06-15T06:12:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a6e5d39c-8f1f-4be9-b2d2-7409936fb43a.json and https://artists.proofprofile.net/proofs/artist/a6e5d39c-8f1f-4be9-b2d2-7409936fb43a.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 0xf13ac3e299d88c94ab70a0d53a84d0ac796f27b4a27ca3e72db81c09b78a37dd. 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/QZHZ32015646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bbab9801ba1874ea38f84f9f8399a0929e48463123a0c697fbb4a62f1daddb. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZ5AB1873407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef66be1766a1c83a2abfc2828c57a1c5e77fd71811efca8987da9647e7776ce. 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/BRBUQ2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8ce2d26057abca497e19ae35bee2dc9c4e607cb4a3fcd41beba30bb6beb219. 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/BRBUQ2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd8a5c33f196ae1951c284382cc2b5fd5728acef8718ff7a116807314699d19. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/BRBUQ2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc67f2924364e4cf12662da0cdf1f72f8c1f1f50a759217ce62ce84473eabdc. 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/BRBUQ2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4eab510169aaef5dcf01ad6cc7894accd73a2557304836d9b66577f5645ed204. 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/BRBUQ2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea5c6432b7ab96f849b6ee36e61253e143e4ad32cfa67d9463b016cb6dae70f. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/BRBUQ2000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ff76a7c47a8b9216a7c3744ca635d572312ac83741266b299071a24978a9ce. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/BRBUQ2000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeb35fcaddd20f3bffb0fe17f685c2584e9d7e32a4cda46fb4869a0960c23942. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BRBUQ2000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1a14a500dfae094c169b4c7684e7e45483bbd4d93e7cd9fe5354787e8514f1. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/BRBUQ2000016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c7c8c63ddb0ae56708e88778d8c063b66c8287578ffe94e36fe3c247d518241. 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/BRBUQ2000014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771ccd7959ab67a82528d90494dd37c2bec48b5ebbad80fef5179f7d2c493a16. 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/BRBUQ2000018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651f38be3d3d0654001f49cf4521d18251481edf0f797bfd703775320e4da0c8. 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/BRBUQ2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf993b30936b6a02d2cf0347c800cd96e7a27363bf8f9b88b76d092f80737ecf1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRBUQ2000017.
Quando o Sol Chegar (Instrumental-Acoustic Paradise) [Acustico]