SL may refer to: Arts and entertainment SL (rapper), a rapper from London Second Life, a multi-user 3D virtual world Sensei's Library, an Internet site dedicated to the game of Go Subdominant lei
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 0x5dfcd14d1d9d605d573f2fa41ed2bf691ea5fd1c53f06aac4fa81329405c2e88. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/081f7b1f-52c4-4f3e-98b5-c87b8dad6dab.json and https://artists.proofprofile.net/proofs/artist/081f7b1f-52c4-4f3e-98b5-c87b8dad6dab.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 0x05004eab8d6fc2543fdd1a55495261489ceb2b1c6b399828905cb4cbb7a92bca. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFF2321395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf546dce2798c90a93485ebc73ed347f35ef520a41947c85bd97381bc0dae834c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZWFF2321396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bd3efaa343c2dc1cb074d3b6de968bfaae57731d0ee7f5b508a1ae4b5d2429a. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/QZWFF2321397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260b95947b3d3016faecf786795dc87a4ba620ddd0f46f7e53d84096a854417a. 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/QZWFF2321398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1f73bf92be8ba07e9c254caf2238b9d48a947aacc7c58dcf801c3baf5610f8. 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/QZWFF2321399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da1d7c4d8842aea01d3761329a28a54141e4d6656920c22f3a68cff6142b2f0. 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/QZWFF2321400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961391b4e56baa4b355f2d6c2a86a55363cd238927de9ea41af87e09b0416b0. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWFF2321401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd648f13244f772513a824e9bd96b1d1ca5002aca332df1c3c83489e97ced3660. 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/QZWFF2321403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf007d4c8e6ab6c2f5e12616b1410874f0b6101fe157ad3d828d3c825180b727. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QZWFF2321406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50b883519dd192e5c9ed824f16cc4da4cb6b009207ba9b8ecb6f7b564eac486. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZPLS2464920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeacd7954a9fa1152ab4efdee1e78d1c29ae617ea95d2729d1329d15a5696f5d. 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/QZTAZ2451466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359e107087f2be948e90fe980adec967d54c9c7e2b224ce6fc84f3fe498dfacc. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZPLS2464919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x509e69c97f3af2e074be7124b63d517bdda1a0495d97f1303299a84a895ab1ba. 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/QZPLS2464918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac77c093ea8fd3ce813b5837b6ccbebec57b9e9a12091b4ccd94b10dbe1fc372. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QZTAZ2451467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3e28567954e09359aa0c76bdce0872e1581bd1ea8cb5df5d544e7458e8404a. 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/QZPLS2464924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdc2602a3eaf34d91306c68cd73d80df90cbb5c93c4169eafb5b799351a8d30. 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/QZES92447173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d167199683fd6a634d5f436512d2aac06169dd03fcffcef3c18de208090e63. 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/QZPLS2464921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d8b0f0aa29edd303a54004ad05b333dcb2ffa8f4c2a69152541a66e2079fe0. 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/QZPLS2464923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ccc46dc3ad7d1524dcb03a60c6c3e946b81df93ebe43e1118ca8ba4e4ce2ffd. 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/QZPLS2464926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4235083f00497190ffbca9355b68706171b9800d65754211a84e29f94b8c80a7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/QZPLS2464917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e0eb223d32ebf08d18e7520928f8ca7e65012d4b1f4fa1c17ebd857f88d414. 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/QZES92449991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc04930282812d3e246fc434d9e933758308ecc86fc48b2a56cde8a4178f305. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZPLS2464929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d3236521c649dde0700af93c760ac02634bf85abb5699df9399d46c9866d63f. 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/QZPLS2464922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2823087490fade7a0397595bb923927d3bde10edc3b7de8a4de6832a6be88af1. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZTB72491280.