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 0x1f58a9cffcd23e4af923df3287e269ab910a9c8dec16505a732576216beeb70c. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73615241-7760-4f58-9944-57bff51c4300.json and https://artists.proofprofile.net/proofs/artist/73615241-7760-4f58-9944-57bff51c4300.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 0xe32e3d1ebb2f8e55b205d3f29bf082e65ad700c9f89ddd42314637c6749e34b4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX8KD2565245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b87f6f6fad4256611a89eea44ccaeee3e44b08a1e6f719683874a8a62d7bde7. 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/GX8KD2532184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08af2435e7200b8cf3005a06735d85da1b8292bfddf225ea0a849775c0ec62a3. 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/GX8LE2501631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d97e3474b19b84f23b8d5a8b8c99d99686673cd0974536047903fadeb26efcd. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GX8LE2566940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a47c7fb39affcc3da1b48a2e5cc8a0c293e038d3e407d7bc274563ff28006. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX8LE2526933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f8bcc0d15ea4496cd519cbb7b674ed3a7a78e7c6f5bae6b79b1fc479c34111. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/GX8LE2542134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a1f0071d904071154100e47ef86e3a00f3fcff734f164805df186a9c4637c2f. 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/GX8LE2568346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x394bed237170627bcd9194bac9a83a3a8bbd79d06ce1d11f0d8b526abc5e5975. 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/GX8LE2572047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa290eae69f59cb4535729d95ef2fa2c4ff912704dc4de66974d8c360e7df614a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/GX8LE2528493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e7af22ccbf141caa1cb5ae4bcc8b8aea1c36020f5fba41c04146c7cb327f9. 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/GX8LE2565738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9026530f02b4a9edb023d9fc0aababb82b8080855276bfc4ef121c271ef548e. Chain 2 (Bitcoin): anchored in block 958083 (2026-07-15T01:50:31Z), 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/GX8LE2564870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5ba911b550f59411c2b8d6fa51bf5aaaf5b26e20fe6bebd32dc6a04c261189. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/GX8LE2593892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc5288471fb26cd80f359f3c95149d37a16fb23846d750b474e8dad1f7732f8. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2585719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec73e96199f874d0958c3eea789cfd4ddb98d401d2a4fb9be45595f2856ea70. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2532876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9104a8513bc1abfea8fdb994e32ae3f55c0dfe3c67ae8a56a2015326b8930b4b. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX38U2566159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2db244728c71231ee62bebe74770e307e27e2d6d46818dba6797d3185b8527f3. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX38U2518026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2c97b35a6bc7b2c7496de785f0549b5dd89b8637a841ee0f4f7fa4929be76a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GX38U2513368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3f755bce6985c489004eb2978020e4d120b589865e24f16bb32476b8af5010. 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/GX38U2594586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecd3e956e11f51c93e7d9d43c2cbf7ac03f3dc643dcf36dab66b271e0645f6b. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/GX38U2598027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5dbfc3a75918e32d4f72af7e5a412c1a9c5e88e183dcfe31c8539112826cfb. 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/GX38U2583977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213447dad08d085d3bd576d37e9543c282765fe0a89d4e5868c8764c48079d03. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/GX38U2598973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1705d3e3648614c9e6f810a654169a8616332d900cd97b4fcd9174a58eddb698. 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/GX38U2572026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162f8d2a428a620b9fc37cc68a903b0547df34e87c30a3b492f0494467f8bf8c. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/GX38U2546910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094fd89cdf5075e0776c947996d63b4a34432d420afffb506fe830e4e634a22d. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/GX38U2590157.