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 0x19acf0718790b2a36e1044347fcae151433c8af872ff71dfcf321ebcb04f5f8b. 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/1a5e54c0-e3d9-4ba0-aa8b-4218cc748388.json and https://artists.proofprofile.net/proofs/artist/1a5e54c0-e3d9-4ba0-aa8b-4218cc748388.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 0x552b68ede0f35530d30df6dac3aa746478fa567ac62525cdaea14004a22da813. 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/SE6TI2186169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd525db65bf993e668db5543eff656963e6cf8147fc96d348d929aaaf022639cf. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:38:27Z), 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/ES75E2204599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa757e332959120d66dd8d4523d8d428185cc7842f892172b4d38df079928406f. 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/ES64E2311821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab6c5ae0cbfa25e9d0cc92b192ade77fcf06407a15d1a824db49930bac4012c. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ES64E2483819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4331af76388b9b60a2bd1e6d9b84a8b033a2c0828754e7a2f9e82bf411186b. 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/ES64E2503233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ee54502867d15832bb56107d5420b0dd8deec4324ac5cadf886dc8a1d7e9c3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:30:28Z), 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/ES64E2503681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2640de5da1281f09c77225f3b5ed03ca9a12a46164cf5f38a06e42d4c649f8ef. 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/ES64E2505877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f4331af76388b9b60a2bd1e6d9b84a8b033a2c0828754e7a2f9e82bf411186b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES64E2503233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ee54502867d15832bb56107d5420b0dd8deec4324ac5cadf886dc8a1d7e9c3. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/ES64E2503681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa435ff33f771d7292f0d1d79ce24e43abcf749bf1cc5684f22dc4e5910f7b807. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:23:18Z), 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/ES64E2407264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f89c122c0b2a97c9593c16526b2e2803c1ca55d02cdeacb3e6fd2b4f5a2d99d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ES64E2507253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05cbd3dac0305c2c158eff9c7eb849dc7c5958e31d21b506a28daa2adc4a404d. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ES64E2507254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b12278c3688272d4bcb079e5fbedac443665d5b7b36fa3420c7dd3f57291d91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES64E2507255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2640de5da1281f09c77225f3b5ed03ca9a12a46164cf5f38a06e42d4c649f8ef. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ES64E2505877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc5bd341c531f1703d9eb7d02a615b23d592c4ad313f46897d1e24b2ef51b32e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES64E2507256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f265e4b2f03620df15372479edfe860b5828b6e411fac417556aea01656001. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ES64E2507257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790c264dd354eb794d0f67b2fd4d27155c8ae6548e0977e304b92fae16d465ed. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/ES64E2507258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491ffc393f1902a5fd5c949d254da3c310db403d56c91d8fc452370ad6ec7cd1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ES71G2501418.