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 0x832953a1bee584f21680bf38dbec6a1688d83368b8254cb187a4114f96e358dd. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e833754-a7a4-4ead-8c7e-0026bacaa71e.json and https://artists.proofprofile.net/proofs/artist/1e833754-a7a4-4ead-8c7e-0026bacaa71e.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04586e9a89579d0a721b5ef5b2ca46cd81efb736d603d84ef6fa58df8fbfa08f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZK6K2303405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda4c2a5f64da10c21d839a1ad2698f277c521d5a10589992d773733af48af81. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:51:33Z), 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/QZK6K2303406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf758d535bd715e1110a9790f8048accb3f45b9445a0ae4579aec70c4f24191. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:30Z), 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/QZK6K2303407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6d0ca3c88832aa17e58b10aa0322e861eb71cc530f49b7b20196102098001d9. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZK6K2303408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99997fc92f8a60d4bda177fad6db591c7b1ab1fe584a38b2a21cb968f7536213. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6K2303410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x629cb3d58a3e6119afb23aebc5903394a2f4bae7f53fe8606e7b42a38e5ab72a. 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/QZK6K2303412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512c1bdda4907671484d9e51fca4e1dd509fe5e436c6169d273ff5d5b666515e. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZTAZ2323113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc43d2a169f82b14cb9f4c160ff222b1bca18bc8a644132ef20e88a6e9cc24c. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZTAZ2323114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x755e65cafa3b7c5aa18eb2d9b45195e2d3665d88f311644e611d78e51c7e7138. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:37:52Z), 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/QZTAZ2323115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb64a893f86260b8b04d151c37fc1be70512529c6acd938229d9caf3e3272e10f. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZTAZ2323116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d973c4c602af166af0e1568fce648d1ec261c1a58f2b8a5234fb74f8b22899. Chain 2 (Bitcoin): anchored in block 957763 (2026-07-12T22:01:25Z), 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/QZTAZ2323117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64760974e133b926be5bc5746666143afbbcceaaa973adb3a19b01e43df54243. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZRP42445780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d54b3cbb990230c7888b75d0faf1e31a5b2d7b46ec7cc7076c398d5f6f3ff4. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZRP42445781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d46e267ff98756799d2b4acb9a3ff9b711b016cfbb191b552b9c3048e8fffd3. Chain 2 (Bitcoin): anchored in block 957761 (2026-07-12T21:55:15Z), 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/QZRP42445782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bd4119c7105610392575c3fa767eda9790da974d3879a33444b0df7e9ac157. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:38Z), 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/QZRP42445783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cae33200cbb3cfe6e5090be1ba16a9f9cb3a954dacd88d7da764dd9a0bcac9f. 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/QZZ7Q2473565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce47a8a6e2e50ce23891c01a72f38573c7939ef1e2d006c6f8d4f31d3ef630ba. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:21:16Z), 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/QZZ7Q2473566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd362b6c8e98aee5d72c7983cc32e66e1d16b0a30ff08a222691635390dce0b0f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZZ7Q2473567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ebefd6f1964b6434ad5473834e6a7cba2768742ace2a12ebe8122dc73409b2c. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7Q2473568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c50957eb6cf2dedc1fcedeaf0f5287a3550ea90d860720342108732b96325c7. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ7Q2473569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf52ce06178b86165ed178b22f33aed3344e51fac9236ed045f1da554ce69f7. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZZ7Q2473570.