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 0x189da9d4e1e79fff260877a3519cb006aeabc6692126f4915ae53a0e3815f446. 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/b4b48054-df7f-4e65-b9c5-1d6a4b228432.json and https://artists.proofprofile.net/proofs/artist/b4b48054-df7f-4e65-b9c5-1d6a4b228432.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 0xba9a5a319ee6e771894eef621518afc7a8cd491ebc45f6ff24c36bcfaa135a66. 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/TCAGG2261815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310abe25f7bd9b5075b8815565c9a769f45bad41c70c0eb5dc6fff874b809ff9. 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/TCAGG2261897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906cf7e5742b08f2d007e6020eaa5755b1f156ca031ca54f9be1729a8ee179cc. 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/TCAGG2261903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35996d74ba9e433c0eea0677832604ac3b967525a0ad25913d04407c4101eff7. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/TCAJJ2592590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2b345227c721b75459d0ed34895210ae899cdf4612a291c984731bcc99b6bc. 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/TCAHE2304902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce1866905f4ba28327adddd2727fd50eebda1320d381fcd71b064dc7f5df3e19. 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/TCAIN2412595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9991de6ed4a2b38922d59d0423056c888c61203683ce63e532a3b2b0cc8bd456. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TCAIO2412606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6320e1ba1f9b16ddfc9821b349e353bff2ebdfbbb1f8715b37d56101a3571cde. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAIO2412669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a86cdcf38b139e7f535b4b97c5320516a3a6cf804693717f5438efe1927dcd. 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/TCAIN2412676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36655673e045db1aec2d7edda78201da821aad6d39a5b4fadef1ff236f4ee703. 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/TCAGL2269178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7d4a40882e404fcced10f2428591e509cfa37c339600410486ebbe41780d63d. 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/TCAGL2269188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0500bfbcdd312267ee21d0133d165ce878e47c1497a7c87393589d93b85bc6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAGL2269193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8311ee675328c8ee1767427cd8940fcc7e94b0304cf3eb06b81afbfd7b53931. 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/TCAGL2269199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8620a89af0ce7f26fb8c6f5a5aeaca6449ea4e367ca071f04043e8e0a17e78b. 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/TCAGG2203361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb306fe5b763bb5a0d4b2e9046eea8d55383dc8b57c76632b7ac831be9f8e568. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/TCAIN2412621.
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 0x36028ba62739d5352a4b875eee5a6583f2b324bfd55f767894617ff652dfd7e3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TCAIN2412629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9e905d7c9eaa6abd9233e7eb2b4ae75a275ab92f98c85d994971b3977fd5b89. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/TCAIN2412638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ea7e886328477312d24f3e1254dd5b0033f71a5a8b555c924315a7f7aea43. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TCAIF2410717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07727eab41df58da368bb73e31cf19839fea7dd4425d2f07e66b01a0dfa21070. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TCAIO2412665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1512b25cde9f83d79e7ab07074a9c4392564abbc1a0c92a6701ef5bd396fd62. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/TCAIN2412688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81195584efdc71ee9e67ee12fc15d7fa8d9067750f399e50e3a47d94c1d9fcf3. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/TCAGL2269195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb699af5fd661c09cbb002d97819a0182dc5d73599187a88efab0bc2aba4c644f. 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/TCAGL2269221.