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 0x19a7b60e860abc1086bd05e5be8981e66f9064bcc36b10a40f83ca6d866cfb6f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/54726032-f785-461d-bd02-6247f8bd7f7b.json and https://artists.proofprofile.net/proofs/artist/54726032-f785-461d-bd02-6247f8bd7f7b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
A Casa do Cemitério / A Volta dos Mortos Vivos
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 0x33e4fc31f33c86583cb73034d1b3ba74f8ed8fb3e8849d19980c67aad0c27327. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZGLS2161937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b00db8403c6e05a6b6a830dcc2d7b19a8135682a64d34b76e97246b76efae64. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2161938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751435f9c6ad40497074c5e1508c6b8699eaa15c84f757ea6126590b5650780e. 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/QZGLS2161939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9fda5c725de512f2fe18ab7580119a39fa3383d302aef178311f1ab992656a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZGLS2161942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77449ca5bd36dcc925bc9b6f82be00c00aef06d1a55ff750321851c64da4f7a3. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZGLS2161940.
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 0xa7bec1970f88d97eaf8df6a0b222a81d23eaa8511b4ec58604822e02a264b25d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US7VG1921850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30a708062244277eab0559be326e8bc6979cfec988366fbd2c8b940b3192223. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1921855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x726b8440d97e07645c46840d89e96490000bda09aa52697290098da9a95044a3. 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/US7VG1921856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149e0cbb5a699073da8671e59d168cd15dc50092c10ace2708adb2d4457673d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1921857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b29e7a51fb5b3f8fd561ec2ac8ba4225c20056e25cd5e0a564031123d8dbf0. 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/US7VG1921858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4afbc007dce8c08aa08e146f3b6580e07cef7d9800857a02e809150fea2e932. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/US7VG1921851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497440a8aeb18b418175a0534a7779516bdf22313ef258283b45bc6914095d6b. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/US7VG1921852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x936c19cf0f23771b32e0256be7caed544db17f32928f5fc2112526dc3feb0c5d. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/US7VG1921853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x223b48390e31ee7cca09543b76373ccc22b358dbede211e79bc337495d46329a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US7VG1921854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c4d8a5ddb665cdce91098d8da76722728450d705e1deb7fa77f2acc12c4cdff. 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/US7VG1920844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17578c37c4643ac7da20ef468038ec149d05546c0797a1c433a2897b49a4fd96. 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/US7VG1920845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f395d46c48bb07f1d834ad988e37c29685e58affd24d728feb4ea35507a2fc. 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/US7VG1920846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6052c538ac3c4188f40304fd7f0a79e5828119ac9af112a8512e3ca8092d3a4. 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/US7VG1920847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f802b1baec0c40ee5c4d086ca3ba219e9bbf5f2aaac4e280061a5427e51dee6. 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/US7VG1920848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4320abe09f93e87f8cf7af3bc53012e6f70c3cf2d889f1dcd1c956b4e3853ae. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US7VG1920852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee277a5c6ac86fd7f36d3b4e900cca3301cfb4c56b4c94be75779432914a2b64. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG1920853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbba7b96d4f987fd036e3a53c39baeeb69aefa617d259e963981c9c0c25722d0. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:39:52Z), 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/US7VG1920843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234c28772a2ddfd9db86fecd5c3c3fe6607c7c60c8182ab62b01df90a59fab3f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/US7VG1920851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf1728525e9143b4892fd68887a45a319542e74241a0ad9c152296d9e3572fe. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US7VG1920849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b009543267e479bc69ac67912d13fe4df4203f8b5fc5c7fc8460933d27b0ea9. 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/US7VG1920850.